# Find the leg lengths of a triangle given hypotenuse?

• May 23rd 2010, 12:59 AM
rhckids
Find the leg lengths of a triangle given hypotenuse?
Hello, I am 14 years old, in 8th grade, Pre-Algebra.

My math teacher isn't easy to approach (Grouchy, yells at you when you make a mistake etc.) so I can't ask her for help. I have a Pre-Algebra Exit Exam coming up and I am currently doing review homework and I can't find this in my notes anywhere (believe me I searched for a good couple hours trying to figure this out)

Long story short I need help!

"The hypotenuse of an Isosceles right triangle has a length of 9 meters. Find the leg lengths to the nearest hundredth of a meter."

• May 23rd 2010, 01:12 AM
mr fantastic
Quote:

Originally Posted by rhckids
Hello, I am 14 years old, in 8th grade, Pre-Algebra.

My math teacher isn't easy to approach (Grouchy, yells at you when you make a mistake etc.) so I can't ask her for help. I have a Pre-Algebra Exit Exam coming up and I am currently doing review homework and I can't find this in my notes anywhere (believe me I searched for a good couple hours trying to figure this out)

Long story short I need help!

"The hypotenuse of an Isosceles right triangle has a length of 9 meters. Find the leg lengths to the nearest hundredth of a meter."

The triangle is isosceles therefore the other two sides have the same length, call it x.

Then from Pythagoras' Theorem: x^2 + x^2 = 9^2 therefore 2x^2 = 81. Solve for x.
• May 23rd 2010, 01:21 AM
Sudharaka
Quote:

Originally Posted by rhckids
Hello, I am 14 years old, in 8th grade, Pre-Algebra.

My math teacher isn't easy to approach (Grouchy, yells at you when you make a mistake etc.) so I can't ask her for help. I have a Pre-Algebra Exit Exam coming up and I am currently doing review homework and I can't find this in my notes anywhere (believe me I searched for a good couple hours trying to figure this out)

Long story short I need help!

"The hypotenuse of an Isosceles right triangle has a length of 9 meters. Find the leg lengths to the nearest hundredth of a meter."