# Proof: Alternate Exterior Angles Converse

## By Mathispower4u

Proof: Alternate Exterior Angles Converse

# Another Pythagorean theorem proof | Right triangles and trigonometry | Geometry | 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

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

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

# 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.

# Pythagorean theorem 1 | Right triangles and trigonometry | Geometry | 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.