Question

A right triangle are 3 cm and 4 cm. What is the length of the hypotenuse?

Answer 1

Oh this is easy.

A² + B² = C²

A and B are the sides.

But it's a little known fact that if those sides are 3 and 4 units, the hypotenuse is 5.  Make sure to keep that in mind, because this trick works for other problems that ask what the hypotenuse is if the sides are 6 and 8, then it's 10.

The answer is 5.