EduSahara™ Assignment
Name : Similarity of Triangles
Chapter : Similarity of Triangles
Grade : ICSE Grade X
License : Non Commercial Use
Question 1
1.
Identify the property by which the two given triangles are similar
  • (i)
    SAS Similarity
  • (ii)
    AAA Similarity
  • (iii)
    not similar
  • (iv)
    SSS Similarity
Question 2
2.
Identify the property by which the two given triangles are similar
  • (i)
    SSS Similarity
  • (ii)
    AAA Similarity
  • (iii)
    SAS Similarity
  • (iv)
    not similar
Question 3
3.
Identify the property by which the two given triangles are similar
  • (i)
    AAA Similarity
  • (ii)
    SSS Similarity
  • (iii)
    SAS Similarity
  • (iv)
    not similar
Question 4
4.
    • In the given figure, △ABC and △TUV are such that
    • ∠B
    • =
    • ∠U
    •  
    • and
    • AB

      TU
    • =
    • BC

      UV
    • .
    • Identify the property by which the two triangles are similar
  • (i)
    not similar
  • (ii)
    SAS Similarity
  • (iii)
    SSS Similarity
  • (iv)
    AAA Similarity
Question 5
5.
    • In the given figure, △DEF and △PQR are such that
    • ∠E
    • =
    • ∠Q
    •  
    • and
    •  
    • ∠F
    • =
    • ∠R
    • .
    • Identify the property by which the two triangles are similar
  • (i)
    SAS Similarity
  • (ii)
    AAA Similarity
  • (iii)
    not similar
  • (iv)
    SSS Similarity
Question 6
6.
    • In the given figure, △GHI and △STU are such that
    • GH

      ST
    • =
    • HI

      TU
    • =
    • IG

      US
    • .
    • Identify the property by which the two triangles are similar
  • (i)
    not similar
  • (ii)
    SAS Similarity
  • (iii)
    SSS Similarity
  • (iv)
    AAA Similarity
Question 7
7.
    • In the given figure,
    •  
    • QR
    • OP
    • .
    • If
    •  
    • NQ

      QO
    • =
    • 5

      3
    • and
    • NP
    • =
    • 11.2 cm
    • , find
    • NR
  • (i)
    8.00 cm
  • (ii)
    9.00 cm
  • (iii)
    5.00 cm
  • (iv)
    7.00 cm
  • (v)
    6.00 cm
Question 8
8.
    • In the given figure,
    •  
    • EF
    • CD
    • .
    • If
    •  
    • BE
    • =
    • 4.54 cm
    • ,
    • BC
    • =
    • 12.1 cm
    • and
    • BD
    • =
    • 14.8 cm
    • , find
    • BF
  • (i)
    4.55 cm
  • (ii)
    7.55 cm
  • (iii)
    5.55 cm
  • (iv)
    3.55 cm
  • (v)
    6.55 cm
Question 9
9.
In the given figure, ST ∥ EF and DT = 12.6 cm, DF = 21 cm and EF = 22 cm, find ST
  • (i)
    14.2 cm
  • (ii)
    12.2 cm
  • (iii)
    13.2 cm
  • (iv)
    15.2 cm
  • (v)
    11.2 cm
Question 10
10.
In the given figure, △PQR is isosceles right-angled at Q and QS ⟂ RP. ∠P =
  • (i)
    ∠U
  • (ii)
    ∠R
  • (iii)
    ∠T
  • (iv)
    ∠Q
  • (v)
    ∠S
Question 11
11.
In the given figure, △OPQ is isosceles right-angled at P and PR ⟂ QO. ∠OPQ =
  • (i)
    ∠OPR
  • (ii)
    ∠PRO
  • (iii)
    ∠RPQ
  • (iv)
    ∠PQR
  • (v)
    ∠ROP
Question 12
12.
    • In the given figure, three lines l , m and n are such that l ∥ m ∥ n.
    • Two transversals PQ and RS intersect them at the points A , B , C and D , E , F respectively.
    • △ABH ∼
  • (i)
    △FEH
  • (ii)
    △DCF
  • (iii)
    △DAE
  • (iv)
    △FDA
  • (v)
    △ACF
Question 13
13.
    • In the given figure, three lines l , m and n are such that l ∥ m ∥ n.
    • Two transversals PQ and RS intersect them at the points A , B , C and D , E , F respectively.
    • ∠AFD  =
  • (i)
    ∠HAB
  • (ii)
    ∠FDA
  • (iii)
    ∠FAC
  • (iv)
    ∠FEH
  • (v)
    ∠HFE
Question 14
14.
    • In the given figure, three lines l , m and n are such that l ∥ m ∥ n.
    • Two transversals PQ and RS intersect them at the points A , B , C and D , E , F respectively.
    • ∠ACF  =
  • (i)
    ∠FDA
  • (ii)
    ∠EHF
  • (iii)
    ∠FEH
  • (iv)
    ∠DAF
  • (v)
    ∠ABH
Question 15
15.
    • In the given figure, three lines l , m and n are such that l ∥ m ∥ n.
    • Two transversals PQ and RS intersect them at the points A , B , C and D , E , F respectively.
    • ∠EHF  =
  • (i)
    ∠HFE
  • (ii)
    ∠CFA
  • (iii)
    ∠DAF
  • (iv)
    ∠BHA
  • (v)
    ∠AFD
Question 16
16.
    • In the given figure, ABCD is a trapezium in which
    • AB ∥ CD
    • and the diagonals
    • BD
    • and
    • AC
    • intersect at
    • E
    • .
    • If
    •  
    • EA
    • =
    • (
      2
      x
      +
      16
      )
    • cm,
    • BE
    • =
    • (
      5
      x
      +
      10
      )
    • cm,
    • EC
    • =
    • (
      x
      +
      13
      )
    • cm and
    • DE
    • =
    • (
      3
      x
      +
      6
      )
    • cm, find the value of x
  • (i)
    (
    18
    ,
    -1
    )
  • (ii)
    (
    17
    ,
    -3
    )
  • (iii)
    (
    17
    ,
    -2
    )
  • (iv)
    (
    0
    ,
    19
    )
  • (v)
    (
    19
    ,
    -2
    )
Question 17
17.
    • In the given figure, DEFG is a trapezium in which
    • DE ∥ FG
    • and the diagonals
    • EG
    • and
    • DF
    • intersect at
    • H
    • .
    • △HDE
    •  
  • (i)
    △HFG
  • (ii)
    △HEF
  • (iii)
    △EFG
  • (iv)
    △HGD
  • (v)
    △GDE
Question 18
18.
In the given figure, the altitudes SG and HT of △FGH meet at R. △TGH ∼
  • (i)
    △RGH
  • (ii)
    △SHG
  • (iii)
    △TGR
  • (iv)
    △SHR
  • (v)
    △RTS
Question 19
19.
In the given figure, the altitudes SC and DT of △BCD meet at R. ∠DSR  =
  • (i)
    ∠RDS
  • (ii)
    ∠TCR
  • (iii)
    ∠RTC
  • (iv)
    ∠CRT
  • (v)
    ∠SRD
Question 20
20.
    • In the given figure, QR ∥ EF , and median DG bisects QR.
    • If  DG = 15.9 cm, DQ = 9.6 cm and DH = 9.54 cm,  DE =
  • (i)
    15.00 cm
  • (ii)
    18.00 cm
  • (iii)
    16.00 cm
  • (iv)
    14.00 cm
  • (v)
    17.00 cm
Question 21
21.
    • In the given figure, TU ∥ EF , and median DG bisects TU.
    • If  DG = 14.5 cm, DF = 16 cm and DH = 4.83 cm,  UF =
  • (i)
    11.67 cm
  • (ii)
    10.67 cm
  • (iii)
    8.67 cm
  • (iv)
    12.67 cm
  • (v)
    9.67 cm
Question 22
22.
    • In the given figure, RS ∥ IJ , and median HK bisects RS.
    •  
    • △HIK ∼
  • (i)
    △HRL
  • (ii)
    △HIJ
  • (iii)
    △HKJ
  • (iv)
    △HLS
  • (v)
    △IJH
Question 23
23.
In the given figure, △DEF is a triangle in which DG is the internal bisector of ∠D and FH ∥ GD meeting ED produced at H . ∠DFH =
  • (i)
    ∠FDG
  • (ii)
    ∠EGD
  • (iii)
    ∠GFD
  • (iv)
    ∠HDF
  • (v)
    ∠DGF
Question 24
24.
In the given figure, D and E are points on the sides AB and AC respectively of △ABC.For which of the following cases, DE ∥ BC
a)
AD = 9.14 cm, DB = 6.86 cm, AE = 8.57 cm and EC = 6.43 cm
b)
AB = 16 cm, AD = 11.14 cm, AC = 15 cm and EC = 6.43 cm
c)
AB = 16 cm, DB = 6.86 cm, AE = 10.57 cm and AC = 15 cm
d)
AB = 16 cm, DB = 6.86 cm, AC = 15 cm and AE = 8.57 cm
  • (i)
    {a,d}
  • (ii)
    {b,d,a}
  • (iii)
    {b,a}
  • (iv)
    {c,d}
  • (v)
    {b,c,a}
Question 25
25.
In the given figure, the area of the △GHI is x sq.cm. J,K,L are the mid-points of the sides HI , IG and GH respectively. The area of the △JKL is
  • (i)
      • 1

        2
      • of area of △GHI
  • (ii)
      • 1

        4
      • of area of △GHI
  • (iii)
      • 2

        3
      • of area of △GHI
  • (iv)
      • 1

        3
      • of area of △GHI
  • (v)
      • 3

        4
      • of area of △GHI
Question 26
26.
    • In the given figure, the parallelogram ABCD and the triangle △EAB are on the same bases and between the same parallels.
    • The area of the
    • △EAB
    • is x sq.cm. The area of the parallelogram is
  • (i)
      • thrice
      • the area of the triangle
  • (ii)
      • twice
      • the area of the triangle
  • (iii)
      • 5

        4
      • the area of the triangle
  • (iv)
      • 4

        3
      • the area of the triangle
  • (v)
      • 3

        2
      • the area of the triangle
Question 27
27.
If the ratio of the bases of two triangles is J : K and the ratio of the corresponding heights is L : M , the ratio of their areas in the same order is
  • (i)
    JM : KL
  • (ii)
    KL : JM
  • (iii)
    JK : LM
  • (iv)
    JL : KM
  • (v)
    LM : JK
Question 28
28.
In the given △FGH, IJ ∥ GH. If  FI : IG = 9 cm : 9 cm  and  FH = 20 cm, FJ =
  • (i)
    12.00 cm
  • (ii)
    10.00 cm
  • (iii)
    9.00 cm
  • (iv)
    8.00 cm
  • (v)
    11.00 cm
Question 29
29.
In the given two similar triangles, if j = 19 cm, k = 18 cm, l = 20 cm, m = 11.4 cm, find n
  • (i)
    11.80 cm
  • (ii)
    9.80 cm
  • (iii)
    12.80 cm
  • (iv)
    10.80 cm
  • (v)
    8.80 cm
Question 30
30.
In the given figure, given ∠HEF = ∠GEH, x : y = 7.5 cm : 7.5 cm and p = 17 cm, find q =
  • (i)
    16.00 cm
  • (ii)
    19.00 cm
  • (iii)
    18.00 cm
  • (iv)
    15.00 cm
  • (v)
    17.00 cm
Question 31
31.
In the given figure, given ∠KHI = ∠JHK, p = 8.26 cm, q = 7.74 cm and IJ = 16 cm, find IK =
  • (i)
    6.26 cm
  • (ii)
    7.26 cm
  • (iii)
    10.26 cm
  • (iv)
    9.26 cm
  • (v)
    8.26 cm
Question 32
32.
In the given figure, DEFG is a trapezium where OD = 12 cm , OF = 4 cm and OG = 4 cm . Find OE =
  • (i)
    14 cm
  • (ii)
    10 cm
  • (iii)
    13 cm
  • (iv)
    12 cm
  • (v)
    11 cm
Question 33
33.
In the given figure, ∠FGI = 46.62°, find the value of x =
  • (i)
    45.38°
  • (ii)
    42.38°
  • (iii)
    43.38°
  • (iv)
    44.38°
  • (v)
    41.38°
Question 34
34.
In the given figure, ∠BCD = 42.93°, find the value of y =
  • (i)
    47.07°
  • (ii)
    49.07°
  • (iii)
    46.07°
  • (iv)
    45.07°
  • (v)
    48.07°
Question 35
35.
In the given figure, if GH ∥ IJ then
  • (i)
    △GHK ∼ △JIK
  • (ii)
    △GHK ∼ △KIJ
  • (iii)
    △GHK ∼ △KJI
  • (iv)
    △KGH ∼ △KIJ
  • (v)
    △KHG ∼ △KJI
Question 36
36.
In the given figure, △GHI is right-angled at H. Also, HJ ⟂ GI. Which of the following are true?
a)
    • HI
      2
    • =
    • GI
    • .
    • GJ
b)
    • HJ
      2
    • =
    • GJ
    • .
    • JI
c)
    • HI
      2
    • =
    • IG
    • .
    • IJ
d)
    • GH
      2
    • =
    • IG
    • .
    • IJ
e)
    • GH
      2
    • =
    • GI
    • .
    • GJ
  • (i)
    {a,b,c}
  • (ii)
    {d,c}
  • (iii)
    {a,b}
  • (iv)
    {a,d,e}
  • (v)
    {b,c,e}
Question 37
37.
In the given figure, △DEF is right-angled at E. Also, EG ⟂ DF. If  EF = 20 cm, EG = 13.77 cm, then find DE.
  • (i)
    18.00 cm
  • (ii)
    20.00 cm
  • (iii)
    19.00 cm
  • (iv)
    21.00 cm
  • (v)
    17.00 cm
Question 38
38.
In the given figure, △ABC is right-angled at B. Also, BD ⟂ AC. If  AD = 14.9 cm, DC = 9.3 cm, then find BD.
  • (i)
    13.77 cm
  • (ii)
    11.77 cm
  • (iii)
    12.77 cm
  • (iv)
    9.77 cm
  • (v)
    10.77 cm
Question 39
39.
    • In the given figure, △CDE ∼ △MNO and CD = 14 cm, MN = 19.6 cm.
    • If the area of the
    • △CDE
    • =
    • 54.64 sq.cm
    • , find the area of the
    • △MNO
  • (i)
    108.10 sq.cm
  • (ii)
    109.10 sq.cm
  • (iii)
    105.10 sq.cm
  • (iv)
    107.10 sq.cm
  • (v)
    106.10 sq.cm
Question 40
40.
    • In the given figure, △ABC ∼ △OPQ and BC = 10 cm , PQ = 14 cm and
    • AD
    • =
    • 11.76 cm
    • ,
    • find the area of the
    • △OPQ
  • (i)
    115.22 sq.cm
  • (ii)
    116.22 sq.cm
  • (iii)
    114.22 sq.cm
  • (iv)
    117.22 sq.cm
  • (v)
    113.22 sq.cm
Question 41
41.
In the given figure, △ABC & △QRS are similar triangles. If the ratio of the heights AD : QT = 8 : 11, then the ratio of their areas is
  • (i)
    64
    sq.cm
    :
    124
    sq.cm
  • (ii)
    64
    sq.cm
    :
    119
    sq.cm
  • (iii)
    64
    sq.cm
    :
    121
    sq.cm
  • (iv)
    63
    sq.cm
    :
    121
    sq.cm
  • (v)
    65
    sq.cm
    :
    121
    sq.cm
Question 42
42.
In the given figure, points E , F and G are the mid-points of sides CD, DB and BC of △BCD. Which of the following are true?
a)
Area of trapezium CDFG is thrice the area of △BGF
b)
All four small triangles have equal areas
c)
    • Area of trapezium
    • CDFG
    • is
    • 1

      4
    • the area of
    • △BCD
d)
    • Area of
    • △BCD
    • =
    • 1

      3
    • area of
    • △EFG
e)
Area of △BCD = 4 times area of △EFG
  • (i)
    {c,d,e}
  • (ii)
    {a,b,e}
  • (iii)
    {d,b}
  • (iv)
    {c,a,b}
  • (v)
    {c,a}
Question 43
43.
In the given figure, points M , N and O are the mid-points of sides KL, LJ and JK of △JKL. Which of the following are true?
a)
△NML ∼ △JKL
b)
△JON ∼ △JKL
c)
△MON ∼ △JKL
d)
△OKM ∼ △JKL
e)
△MNO ∼ △JKL
  • (i)
    {c,a}
  • (ii)
    {c,b}
  • (iii)
    {a,b,d,e}
  • (iv)
    {c,e,a}
  • (v)
    {c,d}
Question 44
44.
The perimeters of two similar triangles are 30 cm and 16 cm respectively. If one side of the first triangle is 13 cm, find the length of the corresponding side of the second triangle.
  • (i)
    4.93 cm
  • (ii)
    7.93 cm
  • (iii)
    6.93 cm
  • (iv)
    8.93 cm
  • (v)
    5.93 cm
Question 45
45.
In the given figure, G is a point on side EF of △DEF such that ∠FDE = ∠DGF = 102° , ∠GFD = 28°. Find ∠FDG
  • (i)
    51°
  • (ii)
    49°
  • (iii)
    50°
  • (iv)
    48°
  • (v)
    52°
Question 46
46.
KLMN is a square and △KLO is an equilateral triangle. Also, △KMP is an equilateral triangle. If area of △KLO is 'a' sq.units, then the area of △KMP is
  • (i)
      • 1

        2



        3
      • a sq.units
  • (ii)
      • a
        2
      • sq.units
  • (iii)
      • 1

        2
      • a sq.units
  • (iv)
      • 2a sq.units
  • (v)



      • 3
      • a sq.units
Question 47
47.
CDEF is a cyclic trapezium. Diagonals DF and CE intersect at G. If FC = 16 cm, find DE
  • (i)
    18 cm
  • (ii)
    14 cm
  • (iii)
    17 cm
  • (iv)
    16 cm
  • (v)
    15 cm
Question 48
48.
    • A vertical stick
    • 13 m
    • long casts a shadow of
    • 16 m
    • long on the ground.
    • At the same time, a tower casts the shadow
    • 128 m
    • long on the ground.
    • Find the height of the tower.
  • (i)
    106 m
  • (ii)
    104 m
  • (iii)
    103 m
  • (iv)
    105 m
  • (v)
    102 m
Question 49
49.
    • In the given figure, △FGH, RS ∥ GH such that
    • area of
    •  
    • △FRS
    • = area of
    •  
    • RSHG
    • . Find
    •  
    • FR

      FG
  • (i)
    1

    2



    2
  • (ii)
    1
  • (iii)
    1

    2
    4


    2
  • (iv)
    1

    2



    1

    2
  • (v)
    1

    2



    5
Question 50
50.
In the given figure, ∠DAB = ∠CAD and AD ∥ EC and AB = 16 cm, BD = 8 cm and DC = 7 cm. Find AE
  • (i)
    13.00 cm
  • (ii)
    14.00 cm
  • (iii)
    15.00 cm
  • (iv)
    16.00 cm
  • (v)
    12.00 cm
Question 51
51.
    • In the given figure, IK is the angular bisector of
    • ∠I
    • &
    • ∠K
    • HI
    • =
    • 20 cm
    • ,
    • IJ
    • =
    • 21 cm
    • and
    • JK
    • =
    • 18 cm
    • .
    • Find
    • KH
  • (i)
    16.14 cm
  • (ii)
    17.14 cm
  • (iii)
    19.14 cm
  • (iv)
    18.14 cm
  • (v)
    15.14 cm
Question 52
52.
In the given figure, GHI is a triangle and 'O' is a point inside △GHI. The angular bisector of ∠HOG, ∠IOH & ∠GOI meet GH, HI & IG at J, K & L respectively . Then
  • (i)
    GJ . HK . IL = JK . KL . LJ
  • (ii)
    GJ . HK . IL = OG . OH . OI
  • (iii)
    GJ . HK . IL = OJ . OK . OL
  • (iv)
    GJ . HK . IL = JH . KI . LG
  • (v)
    GJ . HK . IL = GH . HI . IG
Question 53
53.
In the given figure, if A, Q, R, S, T, U are equidistant and RP ∥ UB and AB = 23 cm. Find AP
  • (i)
    8.20 cm
  • (ii)
    11.20 cm
  • (iii)
    10.20 cm
  • (iv)
    7.20 cm
  • (v)
    9.20 cm
Question 54
54.
From the given figure and values, find x
  • (i)
    (
    0
    ,
    8
    )
  • (ii)
    (
    9
    ,
    1
    )
  • (iii)
    (
    -1
    ,
    6
    )
  • (iv)
    (
    -1
    ,
    7
    )
  • (v)
    (
    1
    ,
    7
    )
Question 55
55.
If the measures are as shown in the given figure, find  DE
  • (i)
    24.0 cm
  • (ii)
    25.0 cm
  • (iii)
    22.0 cm
  • (iv)
    26.0 cm
  • (v)
    23.0 cm
Question 56
56.
    • In the given figure, the two circles touch each other internally.
    • Diameter
    • OB
    • passes through the centre of the smaller circle.
    • OX = 10 cm
    • ,
    • OY = 24 cm
    • and radius of the inner circle is
    • 6.1 cm
    • .
    • Find the radius of the outer circle.
  • (i)
    12.64 cm
  • (ii)
    14.64 cm
  • (iii)
    15.64 cm
  • (iv)
    16.64 cm
  • (v)
    13.64 cm
    Assignment Key

  •  1) (i)
  •  2) (ii)
  •  3) (ii)
  •  4) (ii)
  •  5) (ii)
  •  6) (iii)
  •  7) (iv)
  •  8) (iii)
  •  9) (iii)
  •  10) (ii)
  •  11) (ii)
  •  12) (v)
  •  13) (v)
  •  14) (v)
  •  15) (iii)
  •  16) (iii)
  •  17) (i)
  •  18) (ii)
  •  19) (iii)
  •  20) (iii)
  •  21) (ii)
  •  22) (i)
  •  23) (i)
  •  24) (i)
  •  25) (ii)
  •  26) (ii)
  •  27) (iv)
  •  28) (ii)
  •  29) (iv)
  •  30) (v)
  •  31) (v)
  •  32) (iv)
  •  33) (iii)
  •  34) (i)
  •  35) (i)
  •  36) (v)
  •  37) (iii)
  •  38) (ii)
  •  39) (iv)
  •  40) (i)
  •  41) (iii)
  •  42) (ii)
  •  43) (iii)
  •  44) (iii)
  •  45) (iii)
  •  46) (iv)
  •  47) (iv)
  •  48) (ii)
  •  49) (i)
  •  50) (ii)
  •  51) (ii)
  •  52) (iv)
  •  53) (v)
  •  54) (iv)
  •  55) (i)
  •  56) (ii)