Question

If I have only 2 Sides of a triangle how do I find the 3rd?

Answer 1

if you are looking for the length of the third side then you can use Pythagorean theorem

Answer 2

law of cosines.

\[c^2 = a^2 + b^2 - 2abcos(\theta)\]
where \[\theta\]is the angle between those 2 sides.

when the angle is 90, cos90 = 0 and it boils down to the pythagorean theorem.

Answer 3

each triangle adds up to be 180 degrees so just add up the two that you have now and subtract it from 180 and you have your answer :)

Answer 4

those are angle measurements, not side measurements

Answer 5

if u have 2 of them whats the number of the 2 sides?