How to identify right triangles on a graph

Use the Pythagorean theorem A^2+B^2=C^2

Pathagreium Therum uses the simple equation a^2 + b^2 = c^2

Let's say a = 4 and b= 3
We'd square those and that would make a = 16 and b = 9
That'd mean 16 + 9 = 25
but now you need to find the square root of your answer
The square root of 25= 5 which means c=5

If you want to confirm an equation as a right angle (since graphs usually aren't visually accurate on math tests) you'd input the equation to the calculator, and it'll say "true" or "false"

If a=4 on the graph, b=3 on the graph, and c=5, you'd input the equation 4^2 + 3^2 = 5^2

And since we already know that's true, we know 4^2 + 3^2 = 5^2 is a right angle!

(hopefully i did that right i suck at mental math- and regular math)