Khan Academy: Use Pythagorean Theorem to Find Right Triangle Side Lengths

Here is a straightforward example of how to apply the Pythagorean Theorem to find an unknown side-length of a trapezoid. Commentary gives additional information on proving that the inside of the trapezoid is a rectangle, but is...

Students solve problems using the Pythagorean Theorem. In this geometry lesson, students identify the Pythagorean Triple and use it to solve real life problems.

If you'd like your lesson on the Pythagorean Theorem to be fun and engaging, check out a math puzzle activity for high schoolers. Your learners will enjoy this visual puzzle that shows how the Pythagorean Theorem works.

In this video, Sal introduces the Pythagorean Theorem to viewers, crossing into the realm of geometry. He uses several examples, including right triangles, to illustrate the applications and uses of the Pythagorean Theorem.

The Pythagorean Theorem works for something other than right triangles; show your class all it can do. Using information from the Pythagorean Theorem, the video shows how to determine whether a triangle is an acute or obtuse triangle....

Find the missing side lengths of isosceles triangles by using the Pythagorean Theorem. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.

Find the area and perimeter of triangles and quadrilaterals by first using the Pythagorean Theorem to find missing side lengths. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or...

This video tutorial lesson [4:32] uses the Pythagorean theorem to find the hypotenuse of a right triangle in an application problem.

Physics can make football players better. A creative video shows learners how to apply the Pythagorean Theorem to defensive situations. The first of a 10-part video series calculates the distance a defender needs to cover using right...

Young mathematicians to the rescue! Pupils use an interactive to find lengths relating a ladder against a building. The problems involve determining how long a ladder must be to reach a given floor to what floor can a given ladder reach.