Free Printable Triangles

1.

If $\Delta ABC$ and $\Delta DEF$ are similar such that 2 AB= DE and BC=8 cm, then EF=

a)

16cm

b)

12cm

c)

8cm

d)

4 cm

2.

$\Delta ABC$ $\sim$ $\Delta\ PQR$ , such that ar( $\Delta$ ABC)=4 ar( $\Delta PQR$ ).If BC= 12 cm, then QR=

a)

9 CM

b)

10 cm

c)

6 cm

d)

8 cm

3.

in the fig, if DE ll BC then find the value of AD

a)

16

b)

8

c)

4

d)

32

4.

In the fig, DE ll BC. find the value of EC

a)

4

b)

18

c)

12

d)

16

5.

In figure,

QA\ \perp\ AB\ and\ PB\ \perp\ AB.\

If AO = 20 cm, BO = 12 cm PB = 18 cm, then AQ = ?

a)

32 cm

b)

28 cm

c)

30 cm

d)

35 cm

6.

If in two triangles ABC and PQR, $\frac{AB}{QR}=\ \frac{BC}{PR}=\ \frac{CA}{PQ}$ , then ..

a)

$\Delta\ PQR\ \sim\Delta\ CAB$

b)

$\Delta\ PQR\ \sim\Delta\ ABC$

c)

$\Delta\ CBA\ \sim\Delta\ PQR$

d)

$\Delta\ BCA\ \sim\Delta\ PQR$

7.

∆DEF ~ ∆ABC, if DE : AB = 2 : 3 and ar(∆DEF) is equal to 44 square units. Find the area (∆ABC).

a)

33cm²

b)

85cm²

c)

90cm²

d)

99cm²

8.

Basic proportionality theorem is known as

a)

Pythagoras theorem

b)

Area theorem

c)

none of the above

d)

Thale's theorem

9.

ABCD is a trapezium whose diagonals AC and BD intersect at O such that OA = (3x - 1) cm, OB = (2x + 1) cm OC = (5x - 3) cm and OD = (6x - 5) cm. Find x.

a)

2

b)

3

c)

2.5

d)

4

10.

In given fig. ΔODC ~ ΔOBA , $\angle$ BOC = 125° and $\angle$ CDO = 70°. Find $\angle$ DCO .

a)

125 $\degree$

b)

55 $\degree$

c)

70 $\degree$

d)

65 $\degree$

Triangles - Class X

Total questions: 10

Worksheet time: 6mins

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