Question

How can you prove a triangle is a right triangle?

Answer 1

http://www.virtualnerd.com/algebra-1/radical-expressions-equations/right-triangle-determination-from-sides.php
this website can help

Answer 2

1. You need the measurements it gives you first;
Here's an example:
The three sides of a triangle are 14, 19, 23. Prove if it's a
right triangle.

Pythagorean Theorem: a^2 + b^2 = c^2. The largest measurement is always the Hypotenuse.
14^2 + 19^2 = 23^2
196 + 361 = 529 Add the sides A and B.
557 = 529 Is this right? No. So, the triangle is NOT a right triangle.
If the triangle WAS right, then the numbers would equal each other.

2. Determine whether it has a right angle.