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!

1. 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.

2. Delilah

ok thanks but how do you know if "30"
is a right triangle? I thought 90 was a right triangle?

3. Ms. Sue

Ahh -- 30 is the length of the hypotenuse (longest side).

http://www.mathsisfun.com/pythagoras.html

4. Delilah

thanks

5. Ms. Sue

You're welcome.

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