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Chapter 7 Congruence of Triangles Ex 7.1 Solutions

Question - 1 : -
Complete the following statements:
(a) Two line segments are congruent if _______ .
(b) Among the congruent angles, one has a measure of 70°, the measure of the other angle is _______ .
(c) When we write ∠A = ∠B, we actually mean

Answer - 1 : -

(a) they have the same length
(b) 70°
(c) m∠A = m ∠B

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

Answer - 2 : -

• Sharing blades of the same brand.
• Biscuits of the same packets.

Question - 3 : - If ∆ABC ≅ ∆FED under the correspondence ABC ⟷ FED, write all the corresponding congruent parts of the triangles.

Answer - 3 : -

Given: ∆ABC = ∆FED
and ABC ⟷ FED

Question - 4 : -
If ∆DEF ≅ ∆BCA. Write the part of ABCA that correspond to
(i) ∠E
(ii)   
(iii) ∠ZF
(iv)  

Answer - 4 : -

Given: ∆DEF ≅ ∆BCA
(i) ∠E ⟷ ∠C
(ii) ∠F ⟷ ∠A
(iii) EF ⟷ ZA
(iv) DF ⟷ BA

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