Question

If arc AXB and arc AYB are corresponding arcs and m(arc AXB) = 120° then m(arc AYB) =

(A) 140° 

(B) 60° 

(C) 240° 

(D) 160°

Answer 1

(C) 240°

Measure of major arc = 360° – measure of corresponding minor arc 

∴ m (arc AYB) = 360 – m (arc AXB)

∴ m (arc AYB) = 360 – 120 

∴ m (arc AYB) = 240°