# NCERT Mathematics Class 9 Exemplar Ch 7 Triangles Part 1

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**Exercise 7.1**

1. Which of the following is not a criterion for congruence of triangles?

(A) SAS

(B) ASA

(C) SSA

(D) SSS

Answer: C

2. If , and , then

(A)

(B)

(C)

(D)

Answer: B

3. In ∆ ABC, and . Then ∠C is equal to

(A) 40°

(B) 50°

(C) 80°

(D) 130°

Answer: B

4. In ∆ ABC, and Then ∠A is equal to

(A) 80°

(B) 40°

(C) 50°

(D) 100°

Answer: C

5. In ∆ PQR, and and . Then the length of PQ is

(A)

(B)

(C)

(D)

Answer: A

6. D is a point on the side BC of a ∆ ABC such that AD bisects ∠BAC. Then

(A)

(B)

(C)

(D)

Answer: B

7. It is given that and , and . Then which of the following is true?

(A),

(B),

(C),

(D),

Answer: B