Question

If angle ABC = 60° then AOC =
​

Answer 1

We know that the angle at the centre of the circle is twice the angle at the circumference subtended by the same arc.

Thus,

∠AOC=2×∠ABC

⟹∠AOC=2×20

⟹∠AOC=40

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Answer 2

Step-by-step explanation:

if ABC is a triangle and o is the median

then AOC =90°

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