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)