Aaron A. answered • 05/25/18

Tutor

4.9
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Mathematics, Biology, Chemistry

Fruit F.

asked • 05/24/18Angle ABC = x

Line BC is tangent to circle centre O

Line AOC is a straight line

Find angle ACB in terms of x

I got 270-2x:

Angle OAB = OBA = x-90

Angle ACB= 180-(x-90)-x

Apperently this is the wrong answer but I can't wrap my head around why.

Thanks

![enter image description here](https://i.stack.imgur.com/gt0CF.png)

Line BC is tangent to circle centre O

Line AOC is a straight line

Find angle ACB in terms of x

I got 270-2x:

Angle OAB = OBA = x-90

Angle ACB= 180-(x-90)-x

Apperently this is the wrong answer but I can't wrap my head around why.

Thanks

![enter image description here](https://i.stack.imgur.com/gt0CF.png)

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Aaron A. answered • 05/25/18

Tutor

4.9
(7)
Mathematics, Biology, Chemistry

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