7th grade math Pygorean Theroem Ms.Sue please
posted by Delilah
Explain if a triangle with the given lengths is a right triangle.
1. 18, 24, 30
2. 7, 24, 25
3. 13, 14, 15
I really do not know how to solve these problems! I have no idea how!!!! Please help!

Ms. Sue
a^2 + b^2 = c^2
1.
18^2 + 24^2 = C^2
324 + 576 = c^2
900 = c^2
30 = c
The first one is a right triangle.
Do the same thing with the other two problems. 
Delilah
ok thanks but how do you know if "30"
is a right triangle? I thought 90 was a right triangle? 
Ms. Sue
Ahh  30 is the length of the hypotenuse (longest side).
http://www.mathsisfun.com/pythagoras.html 
Delilah
thanks

Ms. Sue
You're welcome.
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