__Class VII, NCERT (CBSE) Mathematics____CONGRUENCE OF TRIANGLES__

Text Book Exercise 7.1 Solution

(Page 137)

Q.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

Q.3: If ΔABC ≅ ΔFED under the correspondence ABC ↔ FED, write all the Corresponding congruent parts of the triangles.

Ans:

If these triangles are congruent, then the corresponding angles and sides will be equal to each other.

∠A ↔ ∠F

∠B ↔ ∠E

∠C ↔ ∠D

Q.4: If ΔDEF ≅ ΔBCA, write the part(s) of ΔBCA that correspond to

(i) ∠E (ii)

Ans:

(i) ∠C (ii)

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