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

Question

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

Answer 1

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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.

Answer 2

Drop a height in front of angle A to make two right angle triangles. Solve from there.

Answer 3

Use the law of cosines: a^2 = b^2 + c^2 -2bc cos A.

Answer 4

You want the Law of Cosines. Link below gives explanation and onscreen calculator.

Source(s): http://hyperphysics.phy-astr.gsu.edu/Hbase/lcos.ht...

Answer 5

given what?