Converse of the Pythagorean theorem: is it a right triangle?

Are these right triangles?

Solution:
We can use the Converse of the Pythagorean Theorem to find if the triangles are right triangles.
If the equation a²+b²=c² is true, then we will have a right triangle.

For the first triangle:

a2+b2=c2 122+352=362 The first triangle is not a right triangle.

For the second triangle:

a2+b2=c2 152+362=392 1521=1521 The second triangle is a right triangle