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In figure. below, O is the centre of the...

In figure. below, `O` is the centre of the (circ)le and `A, B` are points on the (circ)le. Compute `angle A` and `angle B`.

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If `O A=O B`, then `angle A=angle B` `angle O+angle A+angle B=180^(circ)` `60^(circ)+angle A+angle B=180^(circ)` `angle A+angle B=180^(circ)-60=120^(circ)` `angle A=angle B=60^(circ)`
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