Given the quadrilateral RSTO inscribed in the circle with O as centre. Find the size... - MyStudyPals.com

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Mathematics JAMB 2017

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

100o
140o
120o
10o

The correct answer is: C

Explanation

If RST = 60^o

RXT = 2 × RST

(angle at the centre twice angle at the circumference)

RXT = 2 × 60

= 120^o

There is an explanation video available .

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