I used C^2 =A^2 + B^2 formula A is 13 and B is 10

I plugged it in and found the measurement for the dotted line which is 16.4

We have 16.4 and 8. 16.4 is Adjacent and 8 is opposite of the angle.

If you remember Tan= opposite/adjacent for the angle.

inverse of Tan(8/16.4) which is 26 degrees

Answer = 26 degrees. Message me for more help man.

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