Providing it's a right angle triangle the formula is: hypotenuse2-base2 = height2
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It is: perimeter minus hypotenus+base = height Area = 0.5*base*height
Use trigonometry if another angle is given. Use Pythagoras' theorem if the hypotenuse is given. Multiply the area by 2 and divide it by its height if the area is given. Or simply measure it.
No dimensions have been given but to find the hypotenuse of a right angle triangle use Pythagoras' theorem.
-- Square the hypotenuse. (Multiply it by itself.)-- Square the base. (Multiply it by itself.)-- Subtract the square of the base from the square of the hypotenuse.-- Take the square-root of the difference. It's the height of the triangle.
If you are given the hypotenuse and the base then use Pythagoras' theorem.