Question

Suppose a triangle has sides 3, 4, and 5. Which of the following must be true?A. The triangle in question is a right triangle.B. The triangle in question is not a right triangle.C. The triangle in question may or may not be a right triangle.

Answer 1

You can prove the angle is a right angle by converse of pyth. Theorem

Answer 2

A. It is a right triangle.
A^2 + B^2 = C^2
3^2 + 4^2 = C^2
9 + 16 = C^2
25 = C^2
Square Root
5 = C
Confirmed Right Triangle.