EduSahara™ Worksheet
Name : Chapter Based Worksheet
Chapter : Triangles
Grade : CBSE Grade X
License : Non Commercial Use
Question 1
1.
In the given figure, △LMN is isosceles right-angled at M and MO ⟂ NL. ∠N =
  • (i)
    ∠Q
  • (ii)
    ∠P
  • (iii)
    ∠M
  • (iv)
    ∠L
  • (v)
    ∠O
Question 2
2.
In the given figure, PQ ∥ CD and BP = 12 cm, BC = 20 cm and CD = 23 cm, find PQ
  • (i)
    15.8 cm
  • (ii)
    13.8 cm
  • (iii)
    12.8 cm
  • (iv)
    11.8 cm
  • (v)
    14.8 cm
Question 3
3.
    • The ratio of the bases of two triangles ABC and DEF is
    • 8
      :
      7
    • .
    • If the triangles are equal in area, then the ratio of their heights is
  • (i)
    7
    :
    8
  • (ii)
    8
    :
    5
  • (iii)
    9
    :
    7
  • (iv)
    8
    :
    10
  • (v)
    7
    :
    7
Question 4
4.
A vehicle goes 12 km South and then 13 km West. How far is it from its starting point ?
  • (i)
    17.69 km
  • (ii)
    19.69 km
  • (iii)
    16.69 km
  • (iv)
    18.69 km
  • (v)
    15.69 km
Question 5
5.
Identify the property by which the two given triangles are similar
  • (i)
    SAS Similarity
  • (ii)
    not similar
  • (iii)
    SSS Similarity
  • (iv)
    AAA Similarity
Question 6
6.
In the given figure, G is a point on side EF of △DEF such that ∠FDE = ∠DGF = 105° , ∠GFD = 26°. Find ∠FDG
  • (i)
    47°
  • (ii)
    51°
  • (iii)
    49°
  • (iv)
    50°
  • (v)
    48°
Question 7
7.
In the given figure, EFGH is a rhombus. Which of the following are true?
a)
    • EF
      2
    • +
    • FG
      2
    • +
    • GH
      2
    • +
    • EH
      2
    • =
    • EG
      2
    • +
    • FH
      2
b)
    • FG
      2
    • +
    • GH
      2
    • =
    • FH
      2
c)
    • 4
    • EF
      2
    • =
    • EG
      2
    • +
    • FH
      2
d)
    • EF
      2
    • +
    • FG
      2
    • =
    • EG
      2
e)
    • 2
    • EF
      2
    • =
    • EG
      2
    • +
    • FH
      2
  • (i)
    {b,a}
  • (ii)
    {d,c}
  • (iii)
    {a,c}
  • (iv)
    {d,c,a}
  • (v)
    {e,b,a}
Question 8
8.
The altitude and area of an equilateral triangle of side 'a' is
  • (i)
      • 1

        2



        3
      • a,
      • 1

        4



        3
      • a
        2
  • (ii)



      • 3
      • a,
      • 1

        2



        3
      • a
  • (iii)
      • 1

        2



        3
      • a,
      • 1

        2



        3
      • a
        2
  • (iv)



      • 3
      • a,
      • 1

        2



        3
      • a
        2
Question 9
9.
In the given figure, ∠DAB = 36.87°, find the value of x =
  • (i)
    55.13°
  • (ii)
    53.13°
  • (iii)
    52.13°
  • (iv)
    51.13°
  • (v)
    54.13°
Question 10
10.
In the given figure, △GHI is right-angled at H. Also, HJ ⟂ GI. If  GJ = 15.6 cm, HJ = 12.49 cm, then find JI.
  • (i)
    12.00 cm
  • (ii)
    10.00 cm
  • (iii)
    9.00 cm
  • (iv)
    8.00 cm
  • (v)
    11.00 cm
Question 11
11.
In the given figure, △DEF is isosceles with DE = DF and EG ⟂ DF. Then
  • (i)
      • EG
        2
      • +
      • DG
        2
      • = 2
      • FG
      • .
      • DG
  • (ii)
      • EG
        2
      • +
      • FG
        2
      • = 2
      • FG
      • .
      • DG
  • (iii)
      • EG
        2
      • DG
        2
      • = 2
      • FG
      • .
      • DG
  • (iv)
      • EG
        2
      • FG
        2
      • = 2
      • FG
      • .
      • DG
Question 12
12.
    • A vertical stick
    • 12 m
    • long casts a shadow of
    • 11 m
    • long on the ground.
    • At the same time, a tower casts the shadow
    • 88 m
    • long on the ground.
    • Find the height of the tower.
  • (i)
    94 m
  • (ii)
    97 m
  • (iii)
    95 m
  • (iv)
    96 m
  • (v)
    98 m
Question 13
13.
    • In the given figure,
    •  
    • LM
    • JK
    • .
    • If
    •  
    • IL
    • =
    • 9.4 cm
    • ,
    • IJ
    • =
    • 14.1 cm
    • and
    • IK
    • =
    • 10.5 cm
    • , find
    • IM
  • (i)
    7.00 cm
  • (ii)
    6.00 cm
  • (iii)
    9.00 cm
  • (iv)
    5.00 cm
  • (v)
    8.00 cm
Question 14
14.
In the given figure, △EFG is right-angled at F. Also, FH ⟂ EG. If  FG = 16 cm, FH = 11.96 cm, then find EF.
  • (i)
    16.00 cm
  • (ii)
    17.00 cm
  • (iii)
    20.00 cm
  • (iv)
    18.00 cm
  • (v)
    19.00 cm
Question 15
15.
In the given figure, ∠NKL = ∠MKN and KN ∥ OM and KL = 15 cm, LN = 8 cm and NM = 10 cm. Find KO
  • (i)
    19.75 cm
  • (ii)
    16.75 cm
  • (iii)
    20.75 cm
  • (iv)
    18.75 cm
  • (v)
    17.75 cm
Question 16
16.
    • In the given figure, ST ∥ HI , and median GJ bisects ST.
    • If  GH = 18 cm, GJ = 18 cm and GS = 7.71 cm,  KJ =
  • (i)
    9.29 cm
  • (ii)
    12.29 cm
  • (iii)
    11.29 cm
  • (iv)
    8.29 cm
  • (v)
    10.29 cm
Question 17
17.
    • In the given figure, △CDE and △PQR are such that
    • CD

      PQ
    • =
    • DE

      QR
    • =
    • EC

      RP
    • .
    • Identify the property by which the two triangles are similar
  • (i)
    AAA Similarity
  • (ii)
    SSS Similarity
  • (iii)
    not similar
  • (iv)
    SAS Similarity
Question 18
18.
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 = DB . EC . FA
  • (ii)
    AD . BE . CF = AB . BC . CA
  • (iii)
    AD . BE . CF = OD . OE . OF
  • (iv)
    AD . BE . CF = OA . OB . OC
  • (v)
    AD . BE . CF = DE . EF . FD
Question 19
19.
ABCD is a square and △ABE is an equilateral triangle. Also, △ACF is an equilateral triangle. If area of △ABE is 'a' sq.units, then the area of △ACF is
  • (i)
      • 2a sq.units
  • (ii)
      • a
        2
      • sq.units
  • (iii)
      • 1

        2



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

        2
      • a sq.units
  • (v)



      • 3
      • a sq.units
Question 20
20.
    • In the given figure, the parallelogram CDEF and the triangle △GCD are on the same bases and between the same parallels.
    • The area of the
    • △GCD
    • is x sq.cm. The area of the parallelogram is
  • (i)
      • 3

        2
      • the area of the triangle
  • (ii)
      • 5

        4
      • the area of the triangle
  • (iii)
      • twice
      • the area of the triangle
  • (iv)
      • thrice
      • the area of the triangle
  • (v)
      • 4

        3
      • the area of the triangle
Question 21
21.
In the given figure, △ABC is a triangle in which AB = AC and D is a point on BC. Then
  • (i)
      • AB
        2
      • +
      • AD
        2
      • =
      • BC
        2
  • (ii)
      • AB
        2
      • AD
        2
      • =
      • AD
      • .
      • BD
  • (iii)
      • AB
        2
      • AD
        2
      • =
      • AD
      • .
      • CD
  • (iv)
      • AB
        2
      • +
      • AD
        2
      • =
      • BD
      • .
      • CD
  • (v)
      • AB
        2
      • AD
        2
      • =
      • BD
      • .
      • CD
Question 22
22.
Two poles of heights 9 m and 14 m stand vertically on a plane ground. If the distance between their feet is 15 m, find the distance between their tops
  • (i)
    17.81 m
  • (ii)
    16.81 m
  • (iii)
    14.81 m
  • (iv)
    15.81 m
  • (v)
    13.81 m
Question 23
23.
Which of the following are measures of an isosceles right angled triangle ?
  • (i)
    KL = 12 cm , LM = 12 cm , MK = 12 cm
  • (ii)
    KL = 10 cm , LM = 20 cm , MK = 13 cm
  • (iii)
    KL = 11 cm , LM = 13 cm , MK = 10 cm
  • (iv)
    KL = 14 cm , LM = 13 cm , MK = 10 cm
  • (v)
    KL = 13 cm , LM = 13 cm , MK = 18.38 cm
Question 24
24.
In the given figure, the altitudes TE and FU of △DEF meet at S. △UES ∼
  • (i)
    △SEF
  • (ii)
    △SUT
  • (iii)
    △TFS
  • (iv)
    △TFE
  • (v)
    △UEF
Question 25
25.
In the given figure, CDEF is a trapezium where OC = 15 cm , OD = 15 cm and OE = 5 cm . Find OF =
  • (i)
    3 cm
  • (ii)
    5 cm
  • (iii)
    6 cm
  • (iv)
    4 cm
  • (v)
    7 cm
    Assignment Key

  •  1) (iv)
  •  2) (ii)
  •  3) (i)
  •  4) (i)
  •  5) (iii)
  •  6) (iii)
  •  7) (iii)
  •  8) (i)
  •  9) (ii)
  •  10) (ii)
  •  11) (iv)
  •  12) (iv)
  •  13) (i)
  •  14) (iv)
  •  15) (iv)
  •  16) (v)
  •  17) (ii)
  •  18) (i)
  •  19) (i)
  •  20) (iii)
  •  21) (v)
  •  22) (iv)
  •  23) (v)
  •  24) (iii)
  •  25) (ii)