Maths / Circles / Angle at the Centre is Double The Angle at Circumference

QUESTION
 

O is the centre of the given circle. If reflex anglr AOC=270^o, which of the following is the measure of angle ABC;?

Image required

 

OPTIONS
A. 

45^o

B. 

90^o

C. 

135^o

D. 

270^o

Right Option : A

EXPLANATION
Explain TypeExplanation Content
Text

Angle at the centre is double the angle at the circumference

angle at the centre = 360^0-270^0= 90^0

as angle at the circumference = 45^0

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