PSAT Math: The Pythagorean Theorem, Part 1

Learn how to use the Pythagorean Theorem to solve for an unknown side.

Memorize common Pythagorean Triplets and their multiples

Learn how to apply the properties of special triangles (45-45-90 and 30-60-90) to answer math problems on the PSAT

Learn how to use the Pythagorean Theorem to answer PSAT questions solving for the unknown side of a triangle

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.