**Congruence of Triangles**

**Question 1.****Complete the following statements :**

**(a)** Two line segments are congruent if**(b)** Among two congruent angles, one has a measure of 70°; the measure of the other angle is**(c)** When we write ∠A = ∠B, we actually mean

**Solution:**

**(a)** they have the same length**(b)** 70°**(c)** m∠A = m∠B

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

**Solution:**

- Two coins or notes of the same denomination.
- Two keys of the same lock.

**Question 3.****If ∆ABC = FED under the correspondence ABC ↔ FED, write all the corresponding congruent parts of the triangles.**

**Solution:**

∆ABC = ∆FED means that ∆ABC superposes on ∆FED exactly such that the vertices of ∆ABC fall on the vertices of ∆FED in the following order A ↔ F, B ↔ E and C ↔ D.

**Question 4.****If ∆DEF = BCA, write the part(s) of ∆BCA that correspond to**

**Solution:**