This unit discusses radicals and the Pythagorean Formula.

### Radical Expressions with Higher Roots

by Sal Khan
This video explores radical expressions with higher degree roots.
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by Sal Khan
This video explores more techniques for simplifying radical expressions.
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### How to Rationalize a Denominator

by Sal Khan
This video explains the important technique of rationalizing the denominator
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### Extraneous Solutions to Radical Equations

by Sal Khan
This video explains how to deal with extraneous solutions to a radical equation.
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by Sal Khan
This video combines the techniques just covered on a variety of radical equations.
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### More Involved Radical Equation Example

by Sal Khan
This video extends the techniques just developed to apply to more complicated radical equations.
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### Pythagorean Theorem

by Sal Khan
This video explores examples of right triangles, then uses a calculator to compute the Pythagorian Theorem.
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### Distance Formula

by Sal Khan
This video applies the Pythagorean Theorem to the distance between two points.
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### Midpoint Formula

by Sal Khan
This lesson applies the Pythagorean Theorem to the midpoint of a line segment.
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### Visual Pythagorean Theorem Proof

by Sal Khan
This video provides a compelling visual proof to the Pythagorean Theorem
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