A triangle has side lengths 10, 15, and 7. Is the triangle acute, obtuse, or right? Explain

Question

anonymous · Answer

MY ANSWER: Obtuse, because to find if the triangle is right, acute or obtuse you use the Pythagorean Theorem. You plug in the two smaller numbers in the equation to it looks like this, 7^2+10^2=12.2. Since the hypotenuse given in the problem is larger than the hypotenuse you get in the theorem it is obtuse.
Can someone explain what I did wrong?

anonymous · Answer

You're correct.

anonymous · Answer

But my teacher said it was wrong...

anonymous · Answer

The answer would be awkward, I know.

anonymous · Answer

Awkward?

anonymous · Answer

Lol... tell your teacher to look again.

anonymous · Answer

I did, and she still said it was wrong. That is why I am asking for help.

anonymous · Answer

Stop cheating.

anonymous · Answer

Cheating is so pathetic, seriously.

anonymous · Answer

Don't cheat, you learn nothing by cheating.

anonymous · Answer

I'm not?

anonymous · Answer

@e.mccormick Can you help?

anonymous · Answer

@e.mccormick  Don't help him, he's cheating.

anonymous · Answer

I'm not cheating, so if you can't help please leave this thread alone.

e.mccormick · Answer

The only thing I see wrong is ytour math:

$7^2+10^2=12.2$ is not true.

$7^2+10^2=149$ is true and $15^2=225$ is true and $\sqrt{7^2+10^2}\approx12.2$ is true.

anonymous · Answer

Okay, thats it?

e.mccormick · Answer

If that is the exact answer you submitted, yes, that is why it would be marked wrong.  you did not actually apply the Pythagorean Theorem in that equation.  You came close, but forgot the root sign!

anonymous · Answer

Oh okay! Thanks!