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 70°; 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 70°; the measure of the other angle is 70°.
(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