Which of the triangles w/ the given side lengths is NOT a right triangle?

Question

hero · Answer

This is a similar question?

anonymous · Answer

$$A)1, \sqrt{8}, 9$$

anonymous · Answer

Nope, pythagoreum thereom. I got the other one. Thanks! :D

anonymous · Answer

$$B) \sqrt{6}, \sqrt{11}, \sqrt{17}$$

anonymous · Answer

$$C) 1.8, 2.4, 3$$

anonymous · Answer

$$D) \sqrt{4}, \sqrt{5}, 3$$

hero · Answer

I don't see the difficulty with this one. Apply pythagorean theorem.

anonymous · Answer

I am really confused with the um, rationals. How would I simplify them so I could find the answer? I know how to find the answer, just not simplifying the rationals.

hero · Answer

It's not really that difficult. They're called "radicals" not "rationals" by the way.

hero · Answer

By the way, for D, the square root of 4 is 2. That's an easy one.

anonymous · Answer

Right. I mixed it up. It's like 9 and i'm so confuzzled by this. o.o I feel stupid.

hero · Answer

I don't think you need help with this one. Just use pythagorean theorem and a calculator.

anonymous · Answer

Okay then.