Exercise 7.1 Page: 137

**1. Complete the following statements:**

**(a) Two line segments are congruent if ___________.**

**Solution:-**

Two line segments are congruent if they have the same length.

**(b) Among two congruent angles, one has a measure of 70 ^{o}; the measure of the other angle is ___________.**

**Solution:-**

Among two congruent angles, one has a measure of 70^{o}; the measure of the other angle is 70^{o}.

Because, if two angles have the same measure, they are congruent. Also, if two angles are congruent, their measure are same.

**(c) When we write âˆ A = âˆ B, we actually mean .**

**Solution:-**

When we write âˆ A = âˆ B, we actually mean m âˆ A = m âˆ B.

**2. Give any two real-life examples for congruent shapes.**

**Solution:-**

The two real-life example for congruent shapes are

(i) Fan feathers of same brand.

(ii) Size of chocolate in the same brand.

(iii) Size of pens in the same brand

**3. If Î”ABC â‰… Î”FED under the correspondence ABC â†” FED, write all the corresponding congruent parts of the triangles.**

**Solution:-**

Two triangles are congruent if pairs of corresponding sides and corresponding angles are equal.

All the corresponding congruent parts of the triangles are,

âˆ A â†” âˆ F, âˆ B â†” âˆ E, âˆ C â†” âˆ D

(iv)

Â