Question

I'm a right angled triangle base=12m and hypotenuse =15 m what is the length of height

Answer 1

It’s either b or c the hypotenuse is always the longest side

Answer 2

For this problem, you would use the Pythagorean theorem a^2 +b^2=c^2 .
Given that the base is 12, that will be your A and your height will be B. The hypotenuse will be C.
12^2 + b^2= 15^
144+b^2=225
-144 -144
B^2=81
(Take the square root of 81)
b=9 m