The instructor in this video demonstrates how to find the distance between lines using the Pythagorean Formula. Mr. Khan uses computer software (with different colors) to illustrate his points. Sal Khan is the recipient of the 2009 Microsoft Tech Awa...rd in Education. (13:03)[more]

Students learn the Pythagorean Theorem, which states that the sum of the squares of the lengths of the legs of a right triangle is equal to the square of the length of the hypotenuse, or a^2 + b^2 = c^2. Students are then asked to find missing side l...engths of right triangles using the Pythagorean Theorem.[more]

Video uses an electronic black board with different-colored pens. Video shows more Pythagorean Theorem examples. Then goes into a problem where there is a right triangle and one angle that measures 45 degrees and one side of the triangle measures 5.... The problem is to solve for the other two sides. Challenging problem for students to solve, video can be stopped and then restarted to get solution. (09:36)[more]

Video uses an electronic black board with different-colored pens. Discusses what the Pythagorean Theorem is. Discusses a right triangle, which is 90 degrees, and a hypotenuse, which is the side of the triangle opposite the 90 degree angle. Then sh...ows what the Pythagorean Theorem is, Side A squared + Side B squared = Side C squared where Side C is the hypotenuse. Video goes through some examples. This video is good for middle school students. (08:34)[more]

The instructor uses a white board to demonstrate how to use the Pythagorean Theorem to find missing sides of a right triangle. One example is modeled using a step by step approach to plugging known values in to the formula for Pythagorean Theorem.

The Pythagorean theorem is a formula used to solve side lengths of a right triangle, and it is expressed as A squared plus B squared equals C squared. The instructor uses a document camera to model what the Pythagorean Theorem is and how to use it. ...(02:11)[more]

According to the instructor, everyone knows the theorem, but most of us couldn't prove it. The instructor uses writing on computer software to prove his points. (Note: The instructor's second example showing the globe does not take into account the ...curvature of the earth.) (03:04)[more]

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