Math Algebra
posted by Deborah .
The length of the hypotenuse of a right triangle is 30 m. The length of one leg is 20 cm. Find the length of the other leg. Round your answer to the nearest tenth
I know how to do hypotenuse but this doesn't seem to work out...help please

a^2 + b^2 = c^2
20^2 + b^2 = 30^2
400 + b^2 = 900
b^2 = 500
b = 22.36 = 22.4 cm 
So that doesn't really work then does it Ms. Sue  isn't it supposed to be a even number?

I don't think it's supposed to be an even or whole number. Your directions say to round to the nearest tenth.

Thank you Ms. Sue  I understand now... :)

You're welcome, Deborah. :)