Which of the following best describes the primary purpose of the Converse of the Pythagorean Theorem?

To find the length of a missing side in a right triangle.

To determine if a triangle with known side lengths is a right triangle.

To calculate the area of any triangle.

To find the perimeter of a right triangle.

A garden is shaped like a triangle with side lengths of 10 feet, 15 feet, and 20 feet. Is the garden a right triangle?

Yes, because the sides are all multiples of 5.

Yes, because $10^2 + 20^2 = 15^2$ is true.

No, because $10^2 + 15^2 \neq 20^2$.

They used the wrong numbers for the sides.

They should have added the numbers before squaring them.

The longest side was not set as the hypotenuse, 'c'.

The triangle is not a right triangle to begin with.