Exercise 7.1
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 __________.
Ans: a) They have the same length
b) 70°
c) M∠A = M∠B
2). Give any two real – life examples for congruent shapes.
Ans: i) Pack of one side notebooks of the same brand.
ii) Mobiles of same model of same brand.
3). If ∆ABC ≅ ∆FED under the correspondenceABC↔FED, Write all the corresponding congruent pasts of the triangles.
Ans: ∠A ↔ ∠F, ∠B ↔∠E, ∠C ↔ ∠D
and AB ↔ FE, BC ↔ ED, AC ↔ FD
4. If ∆DEF ≅ ∆BCA, write the part (S) of ∆BCA that correspond to
i) ∠E ii) EF iii) ∠F iv) DF
Ans: i) ∠E ↔ ∠C ii) EF ↔ CA
iii) ∠F ↔ ∠A iv) DF ↔ BA
