Hands On%3A Triangles Videos - Free Educational Videos for Students in K - 12


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This page provides a list of educational videos related to Hands On: Triangles. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Hands On: Triangles.


Proof: Alternate Exterior Angles Converse


By Mathispower4u

Proof: Alternate Exterior Angles Converse

      Another Pythagorean theorem proof | Right triangles and trigonometry | Geometry | Khan Academy


      By Khan Academy

      Khan Academy presents Another Pythagorean Theorem Proof, an educational video resource on math.

          The converse of the Pythagorean theorem and special triangles


          By MathPlanetVideos

          Find the value of x in the right triangle.

              Pythagorean theorem 3 | Right triangles and trigonometry | Geometry | Khan Academy


              By Khan Academy

              This three-minute video is from Sal Khan about using the Pythagorean Theorem to solve a word problem: A carpet measures 7 feet long and has a diagonal measurement of square root of 74 feet. Find the width of the carpet Mr. Khan uses computer software for demonstration. The screen is a little 'busy' so the viewer may want to open the screen to 'full screen' to see all more clearly.

                  Proof of Pythagorean Theorem using similar triangles


                  By Matt Stryker

                  Proof of Pythagorean Theorem using similar triangles

                      The Pythagorean theorem intro | Right triangles and trigonometry | Geometry | Khan Academy


                      By Khan Academy

                      Watch this video to review right triangles and the Pythagorean Theorem view an example of using the Pythagorean Theorem to find the length of a hypotenuse (the longest side of a right triangle) view an example of using the Pythagorean Theorem to find the length of a leg of a right triangle

                          Pythagorean theorem 1 | Right triangles and trigonometry | Geometry | Khan Academy


                          By Khan Academy

                          This is a Khan Academy video about solving a word problem involving the need to find the length of a rope that attaches a mast of a boat with the deck of the boat.

                              Pythagorean theorem 2 | Right triangles and trigonometry | Geometry | Khan Academy


                              By Khan Academy

                              In this video, Sal Khan continues discussing the Pythagorean Theorem to solve for the third side of the triangle Mr. Khan uses computer software for demonstration. The screen is a little 'busy' so the viewer may want to open the screen to 'full screen' to see all more clearly.

                                  Proof: Right triangles inscribed in circles | High School Math | Khan Academy


                                  By Khan Academy

                                  Proof showing that a triangle inscribed in a circle having a diameter as one side is a right triangle. All Khan Academy content is available for free at www.khanacademy.org

                                      Area of inscribed equilateral triangle (some basic trig used) | Circles | Geometry | Khan Academy


                                      By Khan Academy

                                      This video will give you a good feel for what inscribed figures are like. It uses some trigonometry to figure out what the area of an equilateral triangle inscribed in a circle is, given the circle's radius. NOTE: We don't actually need trigonometry to solve this problem. Notice that we can view the equilateral triangle as six identical 30-60-90 triangles, the hypotenuses of which are radii of the circle, then use the 30-60-90 triangle side length ratios to figure out the rest of what we need to know to solve the problem.

                                          Area of inscribed equilateral triangle (some basic trig used) | Circles | Geometry | Khan Academy


                                          By Khan Academy

                                          This video will give you a good feel for what inscribed figures are like. It uses some trigonometry to figure out what the area of an equilateral triangle inscribed in a circle is, given the circle's radius. NOTE: We don't actually need trigonometry to solve this problem. Notice that we can view the equilateral triangle as six identical 30-60-90 triangles, the hypotenuses of which are radii of the circle, then use the 30-60-90 triangle side length ratios to figure out the rest of what we need to know to solve the problem.

                                              Parallel and Perpendicular Lines, Transversals, Alternate Interior Angles, Alternate Exterior Angles


                                              By The Organic Chemistry Tutor

                                              parallel and perpendicular lines in addition to transversals and all the angles that are formed by it such as alternate interior and exterior angles.

                                                  Inscribing and circumscribing circles on a triangle


                                                  By Khan Academy

                                                  Inscribing and circumscribing circles on a triangle