Angles and degrees question

Hello everyone,

I'm busy studying for the SAT & have ran into a problem that I do not quite remember in Geometry from my freshman year. I know it's an easy one to solve, but I can't figure out where to start. Can I have a little guidance on this? :

http://farm8.staticflickr.com/7448/9...309356d0_b.jpg

Regards,

Lance

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Re: Angles and degrees question

Quote:

Originally Posted by

**Nepenthes** Hello everyone,

I'm busy studying for the SAT & have ran into a problem that I do not quite remember in Geometry from my freshman year. I know it's an easy one to solve, but I can't figure out where to start. Can I have a little guidance on this? :

...

I've modified your sketch a little bit. The numbers in red are : **180°**

Determine the value of a;

afterwards use the property that