Question

If ABC and DEF are two triangles such that Δ ABC≅ Δ FDE and AB = 5 cm, ∠B = 40° and ∠A = 80°, Then, which of the following is true?

A. DF = 5 cm, ∠F = 60°

B. DE = 5 cm, ∠E = 60°

C. DF = 5 cm, ∠E = 60°

D. DE = 5 cm, ∠D = 40°

Answer 1

In ΔABC,

∠A + ∠B + ∠C = 180°

80° + 40°+ ∠C = 180°

∠C = 60°

Now, by c.p.c.t

AB = DF = 5 cm

And ∠C = ∠E = 60°