Question

If the measure of arc QR is 80°, what is the measure of angle PQR? (4 points)
40°
50
70°
80°

Answer 1

join the centre of the circle to R



Then angle QCR = 80 angle at the centre subtended by the arc QR

then angle RPQ = 40 angle at the centre double the angle at the circumference standing on the same arc.

Angle PQR = 50 angle sum of a triangle