Question

In the figure, AB=QR, AC=PQ, BC=PR. Also ​

Answer 1

∴ The angles of ∆ ABC and ∆ PQR are equal.

∠A = ∠P, ∠B =∠Q, ∠C = ∠R

(a) AB||PQ,

∴ ∠B = ∠PMN (corresponding angle);

∴ ∠PMN = ∠Q

∴ MN||QR

∴ BC||QR

(b) BC||QR

∠R = ∠MNP = ∠C

∴ NP||AC, PR||AC