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# Does anyone know how to find the length of the third side of a non-right triangle?

Update:

I know that angle a=95 degrees, and side b=30 and side c=20

Update 2:

I also know that sinA/a=SinB/b=SinC/c

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- spongeworthy_usLv 61 decade agoFavorite Answer
The sum of all angles in a triangle is 180. So if you know two of the angles of a non-right triangle, or if you know one of the non-90 degree angles of a right triangle, you can fingure out the remaining one by subtracting the two you do know from 180.

- Dr. J.Lv 61 decade ago
Drop a height in front of angle A to make two right angle triangles. Solve from there.

- 1 decade ago
You want the Law of Cosines. Link below gives explanation and onscreen calculator.

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