RBSE Solutions for Class 7 Maths Chapter 7 Congruence of Triangles Ex 7.1

Rajasthan Board RBSE Solutions for Class 7 Maths Chapter 7 Congruence of Triangles Ex 7.1 Textbook Exercise Questions and Answers.

RBSE Class 7 Maths Solutions Chapter 7 Congruence of Triangles Ex 7.1

Question 1.
Complete the following statements :
(a) Two line segments are congruent if ____________.
Answer:
Two line segments are congruent if they have the same length.

(b) Among two congruent angles, one has a measure of 70s; the measure of the other angles is ____________.
Answer:
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 ____________.
Answer:
When we write ∠A = ∠B, we actually mean measure of ∠A = measure of ∠B. 
m∠A = m∠B 

Question 2.
Give any two real-life examples of congruent shapes.
Answer:

1. Two five-rupee coins.
2. Shaving blades of same packet.

Question 3.
If ΔABC ≅ ΔFED under the correspondence ABC ↔ FED, write all the corresponding congruent parts of the triangles.
Answer:
All the corresponding congruent parts of ΔABC and ΔFED are :

(i) ∠A ↔ ∠F
(ii) ∠B ↔ ∠E
(iii) ∠C ↔ ∠D
(iv) AB ↔ FE
(v) AC ↔ FD
(vi) BC ↔ ED

Question 4.
If ΔDEF ≅ ΔBCA, write the parts of ABCA that are correspond to :
(i) ∠E (ii) \(\overline{E F}\) (iii) ∠F (iv) \(\overline{D F}\)
Answer:
∵ ΔDEF ≅ ΔBCA

(i) ∠E ↔ ∠C
(ii) EF ↔ CA
(iii) ∠F ↔ ∠A
(iv) DF ↔ BA