Applying the pythagorean theorem to find the missing length

The video tutorial explains the concept of right triangles and the Pythagorean theorem. It demonstrates how to apply the theorem to find missing sides of a triangle. The instructor also covers solving equations using square roots, providing examples to illustrate the process. The tutorial concludes with additional example problems to reinforce the concepts learned.

What steps would you take to find the length of the hypotenuse if the legs of a right triangle are 9 and 12?

Explain the process of taking the square root of both sides of an equation and why it is necessary.