Is this a right triangle or no

No

Step-by-step explanation:

You can determine if a triangle is a right triangle using the Pythagorean theorem:

Insert the given values. In a right triangle, the hypotenuse will always be the longest side, so the greatest number is c:

Simplify the exponents (x²=x·x):

Simplify addition:

Since the result is not true, the triangle is not a right triangle.

:Done

this may not be at all, but i use the same website you're using for school, and if i'm stuck doing one of these i try to look for it on the section.