passpadi

2017

Mathematics

JAMB

Given the quadrilateral RSTO inscribed in the circle with O as centre. Find the size angle x and given RST = 60°

A.

100o

B.

140°

C.

120°

D.

10°

Correct Answer: 120°

Explanation

If RST = 60° RXT = 2 × RST (angle at the centre twice angle at the circumference) RXT = 2 × 60 = 120°

If RST = 60° RXT = 2 × RST (angle at the centre twice angle at the circumference) RXT = 2 × 60 = 120°
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