A right triangle has one side of length 11 and a hypotenuse of length 12. How long is the third side of the triangle?

Question

anonymous · Answer

Let lenth of other leg be "a".
Therefore,
a^2+12^2=20^2
a^2=400-144=256
Therefore,
a^2=256
a=16

anonymous · Answer

woahh im so lost

anonymous · Answer

Do you know / understand Pythagoras' theorem?

anonymous · Answer

nope i have failed geometry 3 times

anonymous · Answer

it's very important to learn and understand as it underpins a lot of geometry at your level. It says in a right angled triangle, if you square the two sides adjacent to the right angle, their sum is equal to the square of the hypotenuse (the side opposite the right angle)

It's hard to describe without a picture, it would be worth googling if you dont understand my explanation.

anonymous · Answer

http://www.mathsisfun.com/pythagoras.html go to this site it makes it easy to understand and kinda fun