Question

How do I do problems like these?

Answer 1

I can help you with the first one

Answer 2

Alright. Thanks.

Answer 3

First, line AC looks like a tangent and there is a radius connected to it, so that makes a 90 degree angle

Answer 4

Okay. Is there a formula I can use?

Answer 5

A triangle's interior angles all have to add up to 180. Here is what you have:
180 = 90 + 30 + x

Answer 6

So I solve for x?

Answer 7

yes

Answer 8

Thanks!

Answer 9

yw