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)
    AAA Similarity
  • (ii)
    SAS Similarity
  • (iii)
    SSS Similarity
  • (iv)
    not similar
Question 2
2.
Identify the property by which the two given triangles are similar
  • (i)
    AAA Similarity
  • (ii)
    not similar
  • (iii)
    SAS Similarity
  • (iv)
    SSS Similarity
Question 3
3.
Identify the property by which the two given triangles are similar
  • (i)
    AAA Similarity
  • (ii)
    not similar
  • (iii)
    SAS Similarity
  • (iv)
    SSS Similarity
Question 4
4.
    • In the given figure, △DEF and △RST are such that
    • ∠E
    • =
    • ∠S
    •  
    • and
    • DE

      RS
    • =
    • EF

      ST
    • .
    • Identify the property by which the two triangles are similar
  • (i)
    not similar
  • (ii)
    SSS Similarity
  • (iii)
    SAS Similarity
  • (iv)
    AAA Similarity
Question 5
5.
    • In the given figure, △HIJ and △QRS are such that
    • ∠I
    • =
    • ∠R
    •  
    • and
    •  
    • ∠J
    • =
    • ∠S
    • .
    • Identify the property by which the two triangles are similar
  • (i)
    SSS Similarity
  • (ii)
    AAA Similarity
  • (iii)
    not similar
  • (iv)
    SAS Similarity
Question 6
6.
    • In the given figure, △FGH and △QRS are such that
    • FG

      QR
    • =
    • GH

      RS
    • =
    • HF

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

      QO
    • =
    • 2

      1
    • and
    • NP
    • =
    • 11.4 cm
    • , find
    • NR
  • (i)
    7.60 cm
  • (ii)
    5.60 cm
  • (iii)
    6.60 cm
  • (iv)
    9.60 cm
  • (v)
    8.60 cm
Question 8
8.
    • In the given figure,
    •  
    • DE
    • BC
    • .
    • If
    •  
    • AD
    • =
    • 7.68 cm
    • ,
    • AB
    • =
    • 12.8 cm
    • and
    • AC
    • =
    • 11.4 cm
    • , find
    • AE
  • (i)
    5.84 cm
  • (ii)
    7.84 cm
  • (iii)
    6.84 cm
  • (iv)
    8.84 cm
  • (v)
    4.84 cm
Question 9
9.
In the given figure, PQ ∥ EF and DF = 20 cm, PQ = 12.6 cm and EF = 21 cm, find DQ
  • (i)
    11.0 cm
  • (ii)
    12.0 cm
  • (iii)
    14.0 cm
  • (iv)
    10.0 cm
  • (v)
    13.0 cm
Question 10
10.
In the given figure, △OPQ is isosceles right-angled at P and PR ⟂ QO. ∠R =
  • (i)
    ∠S
  • (ii)
    ∠O
  • (iii)
    ∠T
  • (iv)
    ∠P
  • (v)
    ∠Q
Question 11
11.
In the given figure, △CDE is isosceles right-angled at D and DF ⟂ EC. ∠DEF ≠
  • (i)
    ∠FCD
  • (ii)
    ∠ECD
  • (iii)
    ∠CDF
  • (iv)
    ∠DFC
  • (v)
    ∠FDE
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)
    △DAE
  • (ii)
    △FDA
  • (iii)
    △ACF
  • (iv)
    △DCF
  • (v)
    △FEH
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.
    • ∠HAB  =
  • (i)
    ∠HFE
  • (ii)
    ∠FDA
  • (iii)
    ∠FEH
  • (iv)
    ∠AFD
  • (v)
    ∠FAC
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.
    • ∠ABH  =
  • (i)
    ∠FDA
  • (ii)
    ∠EHF
  • (iii)
    ∠FEH
  • (iv)
    ∠DAF
  • (v)
    ∠ACF
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.
    • ∠CFA  =
  • (i)
    ∠EHF
  • (ii)
    ∠AFD
  • (iii)
    ∠HFE
  • (iv)
    ∠BHA
  • (v)
    ∠DAF
Question 16
16.
    • In the given figure, KLMN is a trapezium in which
    • KL ∥ MN
    • and the diagonals
    • LN
    • and
    • KM
    • intersect at
    • O
    • .
    • If
    •  
    • OK
    • =
    • (
      2
      x
      +
      3
      )
    • cm,
    • LO
    • =
    • (
      2
      x
      +
      15
      )
    • cm,
    • OM
    • =
    • (
      x
      +
      8
      )
    • cm and
    • NO
    • =
    • (
      x
      +
      16
      )
    • cm, find the value of x
  • (i)
    (
    20
    ,
    18
    )
  • (ii)
    (
    20
    ,
    20
    )
  • (iii)
    (
    18
    ,
    18
    )
  • (iv)
    (
    19
    ,
    19
    )
  • (v)
    (
    18
    ,
    17
    )
Question 17
17.
    • In the given figure, FGHI is a trapezium in which
    • FG ∥ HI
    • and the diagonals
    • GI
    • and
    • FH
    • intersect at
    • J
    • .
    • △JHI
    •  
  • (i)
    △GHI
  • (ii)
    △JGH
  • (iii)
    △IFG
  • (iv)
    △JFG
  • (v)
    △JIF
Question 18
18.
In the given figure, the altitudes SI and JT of △HIJ meet at R. △TIJ ∼
  • (i)
    △SJR
  • (ii)
    △TIR
  • (iii)
    △SJI
  • (iv)
    △RIJ
  • (v)
    △RTS
Question 19
19.
In the given figure, the altitudes UE and FV of △DEF meet at T. ∠FTE  =
  • (i)
    ∠EFT
  • (ii)
    ∠TEF
  • (iii)
    ∠TUV
  • (iv)
    ∠UVT
  • (v)
    ∠VTU
Question 20
20.
    • In the given figure, RS ∥ HI , and median GJ bisects RS.
    • If  GJ = 16.9 cm, GR = 8.5 cm and GK = 8.45 cm,  GH =
  • (i)
    16.00 cm
  • (ii)
    19.00 cm
  • (iii)
    17.00 cm
  • (iv)
    18.00 cm
  • (v)
    15.00 cm
Question 21
21.
    • In the given figure, PQ ∥ IJ , and median HK bisects PQ.
    • If  HK = 13.8 cm, HJ = 16 cm and HL = 9.2 cm,  LK =
  • (i)
    3.60 cm
  • (ii)
    4.60 cm
  • (iii)
    5.60 cm
  • (iv)
    2.60 cm
  • (v)
    6.60 cm
Question 22
22.
    • In the given figure, ST ∥ IJ , and median HK bisects ST.
    •  
    • △HLT ∼
  • (i)
    △HIJ
  • (ii)
    △HIK
  • (iii)
    △IJH
  • (iv)
    △HSL
  • (v)
    △HKJ
Question 23
23.
In the given figure, △GHI is a triangle in which GJ is the internal bisector of ∠G and IK ∥ JG meeting HG produced at K . ∠JGH =
  • (i)
    ∠GJI
  • (ii)
    ∠KGI
  • (iii)
    ∠JIG
  • (iv)
    ∠IKG
  • (v)
    ∠HJG
Question 24
24.
In the given figure, F and G are points on the sides CD and CE respectively of △CDE.For which of the following cases, FG ∥ DE
a)
CF = 8.5 cm, FD = 8.5 cm, CG = 8 cm and GE = 8 cm
b)
CD = 17 cm, FD = 8.5 cm, CG = 10 cm and CE = 16 cm
c)
CD = 17 cm, FD = 8.5 cm, CE = 16 cm and CG = 8 cm
d)
CD = 17 cm, CF = 10.5 cm, CE = 16 cm and GE = 8 cm
  • (i)
    {a,c}
  • (ii)
    {b,a}
  • (iii)
    {d,c}
  • (iv)
    {b,c,a}
  • (v)
    {b,d,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)
      • 3

        4
      • of area of △GHI
  • (iii)
      • 1

        4
      • of area of △GHI
  • (iv)
      • 1

        3
      • of area of △GHI
  • (v)
      • 2

        3
      • of area of △GHI
Question 26
26.
    • In the given figure, the parallelogram LMNO and the triangle △PLM are on the same bases and between the same parallels.
    • The area of the
    • △PLM
    • is x sq.cm. The area of the parallelogram is
  • (i)
      • 3

        2
      • the area of the triangle
  • (ii)
      • 4

        3
      • the area of the triangle
  • (iii)
      • twice
      • the area of the triangle
  • (iv)
      • 5

        4
      • the area of the triangle
  • (v)
      • thrice
      • the area of the triangle
Question 27
27.
If the ratio of the bases of two triangles is H : I and the ratio of the corresponding heights is J : K , the ratio of their areas in the same order is
  • (i)
    IJ : HK
  • (ii)
    HJ : IK
  • (iii)
    JK : HI
  • (iv)
    HI : JK
  • (v)
    HK : IJ
Question 28
28.
In the given △FGH, IJ ∥ GH. If  FI : IG = 8.5 cm : 8.5 cm  and  FH = 16 cm, FJ =
  • (i)
    9.00 cm
  • (ii)
    8.00 cm
  • (iii)
    7.00 cm
  • (iv)
    6.00 cm
  • (v)
    10.00 cm
Question 29
29.
In the given two similar triangles, if c = 15 cm, d = 16 cm, e = 17 cm, h = 10.2 cm, find f
  • (i)
    8.00 cm
  • (ii)
    9.00 cm
  • (iii)
    7.00 cm
  • (iv)
    11.00 cm
  • (v)
    10.00 cm
Question 30
30.
In the given figure, given ∠JGH = ∠IGJ, x : y = 8.26 cm : 7.74 cm and q = 15 cm, find p =
  • (i)
    18.00 cm
  • (ii)
    17.00 cm
  • (iii)
    14.00 cm
  • (iv)
    15.00 cm
  • (v)
    16.00 cm
Question 31
31.
In the given figure, given ∠EBC = ∠DBE, p = 7.29 cm, q = 7.71 cm and CD = 15 cm, find CE =
  • (i)
    7.29 cm
  • (ii)
    5.29 cm
  • (iii)
    9.29 cm
  • (iv)
    6.29 cm
  • (v)
    8.29 cm
Question 32
32.
In the given figure, DEFG is a trapezium where OD = 13 cm , OE = 13 cm and OF = 4 cm . Find OG =
  • (i)
    2 cm
  • (ii)
    6 cm
  • (iii)
    5 cm
  • (iv)
    3 cm
  • (v)
    4 cm
Question 33
33.
In the given figure, ∠EBC = 42.93°, find the value of x =
  • (i)
    47.07°
  • (ii)
    45.07°
  • (iii)
    48.07°
  • (iv)
    46.07°
  • (v)
    49.07°
Question 34
34.
In the given figure, ∠BCD = 41.7°, find the value of y =
  • (i)
    49.30°
  • (ii)
    50.30°
  • (iii)
    48.30°
  • (iv)
    46.30°
  • (v)
    47.30°
Question 35
35.
In the given figure, if EF ∥ GH then
  • (i)
    △IEF ∼ △IGH
  • (ii)
    △IFE ∼ △IHG
  • (iii)
    △EFI ∼ △HGI
  • (iv)
    △EFI ∼ △IGH
  • (v)
    △EFI ∼ △IHG
Question 36
36.
In the given figure, △EFG is right-angled at F. Also, FH ⟂ EG. Which of the following are true?
a)
    • EF
      2
    • =
    • GE
    • .
    • GH
b)
    • FG
      2
    • =
    • EG
    • .
    • EH
c)
    • FH
      2
    • =
    • EH
    • .
    • HG
d)
    • EF
      2
    • =
    • EG
    • .
    • EH
e)
    • FG
      2
    • =
    • GE
    • .
    • GH
  • (i)
    {a,c,d}
  • (ii)
    {a,b,e}
  • (iii)
    {a,c}
  • (iv)
    {b,d}
  • (v)
    {c,d,e}
Question 37
37.
In the given figure, △CDE is right-angled at D. Also, DF ⟂ CE. If  DE = 19 cm, DF = 11.77 cm, then find CD.
  • (i)
    17.00 cm
  • (ii)
    15.00 cm
  • (iii)
    14.00 cm
  • (iv)
    16.00 cm
  • (v)
    13.00 cm
Question 38
38.
In the given figure, △FGH is right-angled at G. Also, GI ⟂ FH. If  FI = 11 cm, IH = 12.3 cm, then find GI.
  • (i)
    9.63 cm
  • (ii)
    10.63 cm
  • (iii)
    13.63 cm
  • (iv)
    11.63 cm
  • (v)
    12.63 cm
Question 39
39.
    • In the given figure, △ABC ∼ △NOP and AB = 11 cm, NO = 15.4 cm.
    • If the area of the
    • △ABC
    • =
    • 54.64 sq.cm
    • , find the area of the
    • △NOP
  • (i)
    105.10 sq.cm
  • (ii)
    109.10 sq.cm
  • (iii)
    106.10 sq.cm
  • (iv)
    108.10 sq.cm
  • (v)
    107.10 sq.cm
Question 40
40.
    • In the given figure, △DEF ∼ △NOP and EF = 15 cm , OP = 21 cm and
    • DG
    • =
    • 12.38 cm
    • ,
    • find the area of the
    • △NOP
  • (i)
    183.02 sq.cm
  • (ii)
    181.02 sq.cm
  • (iii)
    182.02 sq.cm
  • (iv)
    184.02 sq.cm
  • (v)
    180.02 sq.cm
Question 41
41.
In the given figure, △CDE & △PQR are similar triangles. If the ratio of the heights CF : PS = 10 : 14, then the ratio of their areas is
  • (i)
    100
    sq.cm
    :
    198
    sq.cm
  • (ii)
    100
    sq.cm
    :
    194
    sq.cm
  • (iii)
    99
    sq.cm
    :
    196
    sq.cm
  • (iv)
    101
    sq.cm
    :
    196
    sq.cm
  • (v)
    100
    sq.cm
    :
    196
    sq.cm
Question 42
42.
In the given figure, points F , G and H are the mid-points of sides DE, EC and CD of △CDE. Which of the following are true?
a)
All four small triangles have equal areas
b)
Area of △CDE = 4 times area of △FGH
c)
    • Area of trapezium
    • DEGH
    • is
    • 1

      4
    • the area of
    • △CDE
d)
Area of trapezium DEGH is thrice the area of △CHG
e)
    • Area of
    • △CDE
    • =
    • 1

      3
    • area of
    • △FGH
  • (i)
    {c,a,b}
  • (ii)
    {a,b,d}
  • (iii)
    {c,e,d}
  • (iv)
    {c,a}
  • (v)
    {e,b}
Question 43
43.
In the given figure, points D , E and F are the mid-points of sides BC, CA and AB of △ABC. Which of the following are true?
a)
△DFE ∼ △ABC
b)
△EDC ∼ △ABC
c)
△AFE ∼ △ABC
d)
△DEF ∼ △ABC
e)
△FBD ∼ △ABC
  • (i)
    {a,e,b}
  • (ii)
    {a,b}
  • (iii)
    {a,d}
  • (iv)
    {a,c}
  • (v)
    {b,c,d,e}
Question 44
44.
The perimeters of two similar triangles are 33 cm and 22 cm respectively. If one side of the first triangle is 15 cm, find the length of the corresponding side of the second triangle.
  • (i)
    10.00 cm
  • (ii)
    8.00 cm
  • (iii)
    9.00 cm
  • (iv)
    12.00 cm
  • (v)
    11.00 cm
Question 45
45.
In the given figure, D is a point on side BC of △ABC such that ∠CAB = ∠ADC = 101° , ∠DCA = 26°. Find ∠CAD
  • (i)
    52°
  • (ii)
    55°
  • (iii)
    53°
  • (iv)
    51°
  • (v)
    54°
Question 46
46.
MNOP is a square and △MNQ is an equilateral triangle. Also, △MOR is an equilateral triangle. If area of △MNQ is 'a' sq.units, then the area of △MOR is
  • (i)
      • 1

        2



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

        2
      • a sq.units
  • (iii)



      • 3
      • a sq.units
  • (iv)
      • 2a sq.units
  • (v)
      • a
        2
      • sq.units
Question 47
47.
JKLM is a cyclic trapezium. Diagonals KM and JL intersect at N. If MJ = 15 cm, find KL
  • (i)
    13 cm
  • (ii)
    14 cm
  • (iii)
    17 cm
  • (iv)
    15 cm
  • (v)
    16 cm
Question 48
48.
    • A vertical stick
    • 13 m
    • long casts a shadow of
    • 15 m
    • long on the ground.
    • At the same time, a tower casts the shadow
    • 120 m
    • long on the ground.
    • Find the height of the tower.
  • (i)
    104 m
  • (ii)
    106 m
  • (iii)
    102 m
  • (iv)
    103 m
  • (v)
    105 m
Question 49
49.
    • In the given figure, △CDE, RS ∥ DE such that
    • area of
    •  
    • △CRS
    • = area of
    •  
    • RSED
    • . Find
    •  
    • CR

      CD
  • (i)
    1

    2
    4


    2
  • (ii)
    1

    2



    -1
  • (iii)
    1

    2



    2
  • (iv)
    1
  • (v)
    1

    2



    5
Question 50
50.
In the given figure, ∠DAB = ∠CAD and AD ∥ EC and AB = 18 cm, BD = 8 cm and DC = 9 cm. Find AE
  • (i)
    21.25 cm
  • (ii)
    18.25 cm
  • (iii)
    19.25 cm
  • (iv)
    20.25 cm
  • (v)
    22.25 cm
Question 51
51.
    • In the given figure, GI is the angular bisector of
    • ∠G
    • &
    • ∠I
    • FG
    • =
    • 20 cm
    • ,
    • GH
    • =
    • 20 cm
    • and
    • HI
    • =
    • 21 cm
    • .
    • Find
    • IF
  • (i)
    22.00 cm
  • (ii)
    20.00 cm
  • (iii)
    19.00 cm
  • (iv)
    23.00 cm
  • (v)
    21.00 cm
Question 52
52.
In the given figure, ABC is a triangle and 'O' is a point inside △ABC. The angular bisector of ∠BOA, ∠COB & ∠AOC meet AB, BC & CA at D, E & F respectively . Then
  • (i)
    AD . BE . CF = DE . EF . FD
  • (ii)
    AD . BE . CF = AB . BC . CA
  • (iii)
    AD . BE . CF = OA . OB . OC
  • (iv)
    AD . BE . CF = OD . OE . OF
  • (v)
    AD . BE . CF = DB . EC . FA
Question 53
53.
In the given figure, if A, Q, R, S, T, U are equidistant and RP ∥ UB and AB = 27 cm. Find AP
  • (i)
    12.80 cm
  • (ii)
    8.80 cm
  • (iii)
    11.80 cm
  • (iv)
    9.80 cm
  • (v)
    10.80 cm
Question 54
54.
From the given figure and values, find x
  • (i)
    (
    0
    ,
    16
    )
  • (ii)
    (
    3
    ,
    17
    )
  • (iii)
    (
    0
    ,
    17
    )
  • (iv)
    (
    1
    ,
    18
    )
  • (v)
    (
    19
    ,
    2
    )
Question 55
55.
If the measures are as shown in the given figure, find  FG
  • (i)
    23.0 cm
  • (ii)
    21.0 cm
  • (iii)
    22.0 cm
  • (iv)
    20.0 cm
  • (v)
    24.0 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)
    14.64 cm
  • (ii)
    13.64 cm
  • (iii)
    12.64 cm
  • (iv)
    16.64 cm
  • (v)
    15.64 cm
    Assignment Key

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