the length of the hypotenuse of a right triangle with legs of 20 cm and 21 cm.

Question

eg145341 · Answer

I think it's 29 cm.

whpalmer4 · Answer

According to the Pythagorean theorem, if you have a right triangle with legs of length $a$ and $b$, the length of the hypotenuse ($c$) will be given by 

$$c^2 = a^2 + b^2$$
Don't make the frequent rookie mistake of forgetting to take the square root of the sum!

@EG145341 please don't provide answers; the goal of OpenStudy is to help the student learn how to do it on their own