Sagot :
well you should know first what the pythagorean theorem is. then you should memorize it in order for you to solve `something that needed it.
just follow the formula which is c²=a²+b²
for ex the hypotenuse is c then the opposite is b and the adjacent is a so the formula will be look like this c=√a²+b²
for ex the hypotenuse is c then the opposite is b and the adjacent is a so the formula will be look like this c=√a²+b²