Question

Ncert q no 5 ,class 9 math

Answer 1

Angle PQR is given 100
so,Angle reflex angle POR will be 2*100=200
Angle POR will 360-200=160
OP=OR (Radius of circle)
so,angle OPR=ORP
let angle be =x
x+x+160=180
2x=180-160
2x=20
x=20/2
x=10
Therefor,angle OPR is 10