Math- HELP

There is a triangle inside of a circle. I have to find area of the shaded region which is the circle. So i would have to substract the area of the triangle from the area of the circle.

the radius of the circle is 3 inches.
I found the area of the circle..it is 28.27 in.^2

I am given the three angles of the triangle- 80 degrees, 55 degrees, and 45 degrees

how would I find the area of the triangle with the given 3 angles?? plz help with steps!

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  1. if 5/17 of a region is shaded, what part is not shaded?

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  2. 12/17 duh!

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