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This page provides a list of educational videos related to Angles and Triangles: Practice Problems. You can also use this page to find sample questions, apps, worksheets, lessons , infographics and presentations related to Angles and Triangles: Practice Problems.
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.
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.
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.
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
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.
Inscribing and circumscribing circles on a triangle
By Khan Academy
Inscribing and circumscribing circles on a triangle