Gujarat BoardĀ GSEB Textbook Solutions Class 7 Maths Chapter 7 Congruence of Triangles Ex 7.1 Textbook Questions and Answers.

## Gujarat Board Textbook Solutions Class 7 Maths Chapter 7 Congruence of Triangles Ex 7.1

Question 1.

Complete the following statements:

(a) Two line segments are congruent

(b) Among two congruent angles, one has a measure of 70Ā°; the measure of the other angle is .

(c) When we write ā A = ā B, we actually mean

Solution:

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

(b) Among two congruent angles, one has a measure of 70Ā°; the measure of the other angle is 70Ā°.

(c) When we write ā A = ā B, we actually mean mā A = mā B.

Question 2.

Give any two real-life examples for congruent shapes.

Solution:

(i) Shaving blades of the same brand.

(ii) Biscuits of the same type in the same packet.

Question 3.

If āABC ā
āFED under the correspondence ABC ā FED, write all the corresponding congruent parts of the triangles.

Solution:

All the corresponding congruent parts of āABC and āFED are:

ā A ā ā F, ā B ā ā E, ā C ā ā D

\(\overline{A B}\) ā \(\overline{F E}\), \(\overline{B C}\) ā \(\overline{E D}\), \(\overline{C A}\) ā \(\overline{D F}\)

Question 4.

If āDEF ā
āBCA, write the part(s) of āBCA that corresponding to

(i) ā E

(ii) ā EF

(iii) ā F

(iv) ā DF

Solution:

āµ āDEF ā
āBCA

ā“ (i) ā E ā ā C

(ii) ā EF ā ā CA

(iii) ā F ā ā A

(iv) ā DF ā ā BA