"Find the perimeter of the right triangle."
one of the legs are 12in, the other is 9in. I dont understand how im supposed to find the hypotenuse to get the perimeter. please help?

Question

"Find the perimeter of the right triangle."
one of the legs are 12in, the other is 9in. I dont understand how im supposed to find the hypotenuse to get the perimeter. please help?

jigglypuff314 · Answer

pythagorean theorem
(hypotenuse)^2 = (one side)^2 + (other side)^2
so  hypotenuse^2 = 12^2 + 9^2
so  hpyotenuse = √(144 + 81)
                       = √(225)
                       = 15

amistre64 · Answer

try to avoid doing all the work like that.  let them get their hands dirty, then correct them if they make a mistake, or encourage them when they get it right :)

jigglypuff314 · Answer

doesn't really work if they're afk...