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How do I go about solving this math problem?

rambi36
By rambi36
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300fc5b5dc.png

I know that I have to do something with the tangents and stuff but I don't really know. Sorry if this is annoying but I really need help with this :/ .

Thanks,

Creeps

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I remember learning this but I don't remember. Lol sorry

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I remember learning this but I don't remember. Lol sorry

No problem

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I'd guess 4) 27

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CF and CD both have to be the same, because they're both coming from a point and hitting a tangent of the same circle.

 

Same goes for AD and AE.

 

Therefore AD = 12 and DC is 15

 

Add them together to get your answer: 27.

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CF and CD both have to be the same, because they're both coming from a point and hitting a tangent of the same circle.

 

Same goes for AD and AE.

 

Therefore AD = 12 and DC is 15

 

Add them together to get your answer: 27.

Thanks dude! :D

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Here's a picture illustrating why it works that way. If you draw the yellow line, you'll see that Sin(.5b)=r/(EB)=r/(BF), therefore EB=BF.

It's been a while since I took geometry, but I remember drawing a lot of pictures! Drawing out the problem really helped me to understand it :)

-edit: forgot the picture

post-116183-0-85851900-1427049335_thumb.

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