Question

In a ∆PQR ,the bisectors of PQR and PRQ meet at A . The perpendicular bisectors

of AQ and AR meet QR at B and C respectively. Show that the length of QR is equal to the

perimeter of ABC​

Answer 1

Answer:

130°

Step-by-step explanation:

QPR=80°

∠PQR+∠QPR+∠QRP=180°

∠PQR+∠QRP=100°

2(x+y)=100°

x+y=50°

So, in △QOR

x+y+∠QOR=180°

∴∠QOR=180°−50°

=130°.