Question

O is the centre of a circle having a chord AB. AB= 12, angle AOB = 120°. Find the radius​

Answer 1

Answer:

Radius = 120/12

= 10

radius is 10cm

Step-by-step explanation:

It's right answer

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Answer 2

Answer:

OA=OB (radius of circle)

Angle opposite to equal side are equal

angle OAB = angle OBA= x

In AOB

angle AOB+angle OAB+angle OBA=180° (sum of all angles in triangle)

120°+x+x=180°

2x=60°

x=30°

so angle OAB = angle OBA= 30°