EduSahara™ Worksheet
Name : Chapter Based Worksheet
Chapter : Triangles
Grade : CBSE Grade X
License : Non Commercial Use
Question
1
1.
In the given figure, △DFE is right-angled at F, FG ⟂ DE.
DE
= c,
FE
= a,
DF
= b and
FG
= p.
Which of the following are true?
a)
1
a
2
+
1
b
2
+
1
c
2
=
1
p
2
b)
ab
=
pc
c)
1
a
2
+
1
b
2
=
1
p
2
d)
1
a
2
+
1
b
2
=
1
c
2
+
1
p
2
e)
a
2
+
b
2
=
c
2
(i)
{a,b}
(ii)
{a,b,c}
(iii)
{a,d,e}
(iv)
{b,c,e}
(v)
{d,c}
Question
2
2.
In the given figure, in △FGH, 'O' is a point inside the triangle. OI ⟂ GH, OJ ⟂ FH and OK ⟂ FG. Then
(i)
FK
2
+
GI
2
+
HJ
2
=
OK
.
OI
+
OI
.
OJ
+
OJ
.
OK
(ii)
FK
2
+
GI
2
+
HJ
2
=
FJ
2
+
HI
2
+
GK
2
(iii)
FK
2
+
GI
2
+
HJ
2
=
OF
.
OG
+
OG
.
OH
+
OH
.
OF
(iv)
FK
2
+
GI
2
+
HJ
2
=
OI
2
+
OJ
2
+
OK
2
Question
3
3.
The ratio of the bases of two triangles ABC and DEF is
9
:
4
.
If the triangles are equal in area, then the ratio of their heights is
(i)
8
:
4
(ii)
10
:
4
(iii)
9
:
6
(iv)
9
:
2
(v)
4
:
9
Question
4
4.
In the given figure, in △EFG, 'O' is a point inside the triangle. OH ⟂ FG, OI ⟂ EG and OJ ⟂ EF. Then
(i)
EJ
2
+
FH
2
+
GI
2
=
OJ
2
+
OI
2
+
OH
2
(ii)
EJ
2
+
FH
2
+
GI
2
=
OE
2
+
OF
2
+
OG
2
−
OH
2
−
OI
2
−
OJ
2
(iii)
EJ
2
+
FH
2
+
GI
2
=
OE
2
+
OF
2
+
OG
2
+
OH
2
+
OI
2
+
OJ
2
(iv)
EJ
2
+
FH
2
+
GI
2
=
EF
2
+
HG
2
+
GE
2
−
FJ
2
−
GH
2
−
IE
2
Question
5
5.
In the given figure, RS ∥ CD and BR = 14.4 cm, RS = 12.6 cm and CD = 21 cm, find BC
(i)
25.0 cm
(ii)
22.0 cm
(iii)
26.0 cm
(iv)
23.0 cm
(v)
24.0 cm
Question
6
6.
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 = 22 cm
and radius of the inner circle is
5.6 cm
.
Find the radius of the outer circle.
(i)
13.32 cm
(ii)
14.32 cm
(iii)
12.32 cm
(iv)
10.32 cm
(v)
11.32 cm
Question
7
7.
GHIJ is a cyclic trapezium. Diagonals HJ and GI intersect at K. If JG = 17 cm, find HI
(i)
18 cm
(ii)
16 cm
(iii)
19 cm
(iv)
17 cm
(v)
15 cm
Question
8
8.
Identify the property by which the two given triangles are similar
(i)
SAS Similarity
(ii)
AAA Similarity
(iii)
SSS Similarity
(iv)
not similar
Question
9
9.
The foot of a ladder resting on a wall from the foot of the wall is 14 m. If the height of the top of the ladder from ground is 15 m, find the length of the ladder
(i)
20.52 m
(ii)
18.52 m
(iii)
22.52 m
(iv)
19.52 m
(v)
21.52 m
Question
10
10.
In the given figure, △GHI is a triangle in which GH = GI and J is a point on HI. Then
(i)
GH
2
+
GJ
2
=
HJ
.
IJ
(ii)
GH
2
+
GJ
2
=
HI
2
(iii)
GH
2
−
GJ
2
=
GJ
.
IJ
(iv)
GH
2
−
GJ
2
=
HJ
.
IJ
(v)
GH
2
−
GJ
2
=
GJ
.
HJ
Question
11
11.
Which of the following are true?
a)
Area of the union of two polygonal region is not equal to the sum of the individual area.
b)
Area of a convex polygonal region is equal to the sum of the areas of all triangles formed by joining the vertices of the polygon with an interior point.
c)
A polygonal region can be divided into a finite number of triangles in a unique way.
d)
Area of the union of two polygonal region is the sum of the individual area.
(i)
{c,a}
(ii)
{d,b}
(iii)
{a,b}
(iv)
{c,b,a}
(v)
{c,d,a}
Question
12
12.
In the given figure, if A, Q, R, S, T, U are equidistant and RP ∥ UB and AB = 22 cm. Find AP
(i)
7.80 cm
(ii)
8.80 cm
(iii)
10.80 cm
(iv)
9.80 cm
(v)
6.80 cm
Question
13
13.
In the given figure, △CDE ∼ △MNO and CD = 13 cm, MN = 18.2 cm.
If the area of the
△CDE
=
64.79 sq.cm
, find the area of the
△MNO
(i)
125.98 sq.cm
(ii)
126.98 sq.cm
(iii)
124.98 sq.cm
(iv)
128.98 sq.cm
(v)
127.98 sq.cm
Question
14
14.
Which of the following are measures of a right angled triangle ?
(i)
OP = 12 cm , PQ = 13 cm , QO = 11 cm
(ii)
OP = 12 cm , PQ = 10 cm , QO = 15.62 cm
(iii)
OP = 12 cm , PQ = 19 cm , QO = 10 cm
(iv)
OP = 12 cm , PQ = 11 cm , QO = 13 cm
(v)
OP = 14 cm , PQ = 14 cm , QO = 14 cm
Question
15
15.
In the given figure, the altitudes TD and EU of △CDE meet at S. ∠ETS =
(i)
∠SET
(ii)
∠TSE
(iii)
∠SUD
(iv)
∠DSU
(v)
∠UDS
Question
16
16.
Which of the following are true?
a)
Any two squares are congruent.
b)
Any two circles are similar.
c)
Any two triangles are similar.
d)
Any two triangles are congruent.
e)
Any two squares are similar.
f)
Any two circles are congruent.
(i)
{a,e,b}
(ii)
{d,f,b}
(iii)
{a,b}
(iv)
{c,e}
(v)
{b,e}
Question
17
17.
In the given figure, ST ∥ CD , and median BE bisects ST.
If BD = 19 cm, BF = 11.27 cm and BT = 12.67 cm, BE =
(i)
14.90 cm
(ii)
17.90 cm
(iii)
16.90 cm
(iv)
18.90 cm
(v)
15.90 cm
Question
18
18.
In the given figure
△KLM
,
N
is the mid-point of
KL
and
NO
∥
LM
,
then
KO
=
(i)
KL
2
(ii)
LM
2
(iii)
LM
(iv)
KN
(v)
MK
2
Question
19
19.
In the given figure, △ABC is a triangle with AD being the median of BC. Then
(i)
AB
2
+
AC
2
=
2
BD
2
+
2
DC
2
(ii)
AB
2
+
AC
2
=
BC
2
(iii)
AB
2
+
AC
2
=
2
DC
2
+
2
AD
2
(iv)
AB
2
+
AC
2
=
AD
2
(v)
AB
2
+
AC
2
=
2
BD
2
+
2
AD
2
Question
20
20.
In the given figure, points K , L and M are the mid-points of sides IJ, JH and HI of △HIJ. Which of the following are true?
a)
△KLM ∼ △HIJ
b)
△LKJ ∼ △HIJ
c)
△KML ∼ △HIJ
d)
△MIK ∼ △HIJ
e)
△HML ∼ △HIJ
(i)
{c,d}
(ii)
{c,e,a}
(iii)
{a,b,d,e}
(iv)
{c,b}
(v)
{c,a}
Question
21
21.
In the given figure, M and N are points on the sides JK and JL respectively of △JKL.For which of the following cases, MN ∥ KL
a)
JK = 16 cm, MK = 8 cm, JL = 19 cm and JN = 9.5 cm
b)
JK = 16 cm, MK = 8 cm, JN = 11.5 cm and JL = 19 cm
c)
JM = 8 cm, MK = 8 cm, JN = 9.5 cm and NL = 9.5 cm
d)
JK = 16 cm, JM = 10 cm, JL = 19 cm and NL = 9.5 cm
(i)
{b,a}
(ii)
{a,c}
(iii)
{b,d,a}
(iv)
{d,c}
(v)
{b,c,a}
Question
22
22.
The perimeters of two similar triangles are 27 cm and 22 cm respectively. If one side of the first triangle is 13 cm, find the length of the corresponding side of the second triangle.
(i)
11.59 cm
(ii)
9.59 cm
(iii)
12.59 cm
(iv)
8.59 cm
(v)
10.59 cm
Question
23
23.
In the given figure, DEFG is a trapezium where OE = 13 cm , OF = 4 cm and OG = 4 cm . Find OD =
(i)
11 cm
(ii)
12 cm
(iii)
13 cm
(iv)
15 cm
(v)
14 cm
Question
24
24.
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)
2a sq.units
(ii)
1
2
√
3
a sq.units
(iii)
√
3
a sq.units
(iv)
1
2
a sq.units
(v)
a
2
sq.units
Question
25
25.
In the given figure, △LMN is isosceles right-angled at M and MO ⟂ NL. ∠NLM ≠
(i)
∠LMN
(ii)
∠OLM
(iii)
∠OMN
(iv)
∠LMO
(v)
∠MNO
Assignment Key
1) (iv)
2) (ii)
3) (v)
4) (ii)
5) (v)
6) (iii)
7) (iv)
8) (iii)
9) (i)
10) (iv)
11) (iii)
12) (ii)
13) (ii)
14) (ii)
15) (iii)
16) (v)
17) (iii)
18) (v)
19) (v)
20) (iii)
21) (ii)
22) (v)
23) (iii)
24) (i)
25) (i)