# NCERT Solutions for Class 7 Maths Chapter 7 Congruence of Triangles Ex 7.1

These NCERT Solutions for Class 7 Maths Chapter 7 Congruence of Triangles Ex 7.1 Questions and Answers are prepared by our highly skilled subject experts.

## NCERT Solutions for Class 7 Maths Chapter 7 Congruence of Triangles Exercise 7.1

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 …………………
(a) Two line segments are congruent if they have the same length.
(b) Among two congruent angles, one has a measure of 70°; the measure of the other angle is 70°.
(c) When we write ∠A ≅ ∠B we actually mean m ∠A = m ∠B.

Question 2.
Give any two real-life examples for congruent shapes.
(i) Two ten-rupee notes.
(ii) Biscuits of the same type in the same packet.

Question 3.
If ΔABC ≅ ΔFED under the correspondences ABC ↔ FED, write all the corresponding congruent parts of the triangles.
Corresponding vertices : A and F; B and E; C and D.

Corresponding sides : $$\overline{\mathrm{AB}}$$ and $$\overline{\mathrm{FE}} ; \overline{\mathrm{BC}}$$ and \overrightarrow{\mathrm{ED}} ; \overline{\mathrm{CA}} and $$\overline{\mathrm{AB}}$$

Corresponding angles : ∠A and ∠F; ∠B and ∠E; ∠C and ∠D

Question 4.
If ΔDEF ≅ ΔBCA, write the part (s) of ΔBCA that correspond to
(i) ∠E
(ii) $$\overline{\mathrm{EF}}$$
(iii) ∠F
(iv) $$\overline{\mathrm{DF}}$$
(ii) $$\overline{\mathrm{CA}}$$
(iv) $$\overline{\mathrm{BA}}$$