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How to do this circle theorem question?

http://i57.tinypic.com/hv9kw9.jpg

I took a photo of the question. I'm really stuck on this circle theorem question, I think that I should write it out as an equation, but I have no idea where to start. Please help! :smile:

:smile:

i'll give rep!

Original post by kittykatieboo

http://i57.tinypic.com/hv9kw9.jpg

I took a photo of the question. I'm really stuck on this circle theorem question, I think that I should write it out as an equation, but I have no idea where to start. Please help! :smile:

:smile:

i'll give rep!

Try drawing in some radii and use the fact that angles in a quadrilateral add up to 360° and the radii and tangent make a 90° angle

Then you should be able to use angles at the centre and circumference

Hope this helps :smile:

:smile:

Posted from TSR Mobile

(edited 9 years ago)

Original post by Arithmeticae

Try drawing in some radii and use the fact that angles in a quadrilateral add up to 180 and the radii and tangent make a 90° angle

Then you should be able to use angles at the centre and circumference

Hope this helps :smile:

:smile:

Posted from TSR Mobile

heeeyyy you got enough rep :colonhash:

:colonhash:

Original post by Arithmeticae

Try drawing in some radii and use the fact that angles in a quadrilateral add up to 180 and the radii and tangent make a 90° angle

Then you should be able to use angles at the centre and circumference

Hope this helps :smile:

:smile:

Posted from TSR Mobile

Angles in a quadrilateral sum to 360 degrees - it's angles in a triangle that sum to 180. Just pointing out, I know it was a typo.

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