# NCERT Class 10 Math Chapter 6 MCQ Question Answer – Triangles

 Class 10 Chapter Triangles Subject Math Category MCQ

## Class 10 Math Chapter 6 MCQ Question Answer

1. Sides of some triangles are given below. Which of the two triangles are similar?

(i) 6 cm, 8 cm, 12 cm (ii) 5 cm, 7 cm, 9 cm. (iii) 3 cm, 4 cm, 6 cm.
(A) (i) and (ii)
(B) (i) and (iii)
(C) (ii) and (iii)
(D) None of these

Ans – (B) (i) and (iii)

2. If ratio of the sides of two similar, triangles is 2 : 3, then the ratio of their areas is :
(A)
(B) 2:3
(C) 4:9
(D) None of these

Ans – (C) 4:9

3. If areas of two similar triangles are in the ratio 4 : 9, then ratio of their corresponding sides are:
(A) 2 : 3
(B) 16 : 81
(C) 3 : 2
(D) 4 : 9

Ans – (A) 2 : 3

4. If areas of two similar triangles are in the ratio 9 : 16, then ratio of their corresponding sides are:
(A) 81 : 256
(B) 9 : 16
(C) 3 : 4
(D) √3 : √4

Ans – (C) 3 : 4

5. If the areas of two similar triangles are 36m² and 121 m² respectively, the ratio of there corresponding sides is:
(A) 11:6
(B) 6:11
(C) 9:11
(D) None of these

Ans – (B) 6:11

6. If two sides of a right angle triangle are 4 cm and 5 cm, then the hypotenuse of the triangle is of length:
(A) cm
(B) 3 cm
(C) 9 cm
(D) None of these

Ans – (A) cm

7. ΔMNL and ΔQPR are similar triangles. In given figure which similarity criterion is used?

(A) S. S. S.
(B) A. A. A.
(C) S. A. S.
(D) None of these.

Ans – (C) S. A. S.

8. In the given figure ΔODC ∼ ΔΟΑΒ, ∠ΒΟC = 100°, ∠ODC = 60°,  then ∠OAB is equal to:

(A) 20°
(B) 80°
(C) 60°
(D) 40°