Pythagorean Theorem Teacher Resources

The purpose of this task is to show that the points on a parabola can be characterized by being equidistant from a point (the focus) and a line (the directrix). Aligns with HSG-GPE.A.2.

This task asks students to examine three triangles in the coordinate plane and explain why they are isosceles triangles. Aligns with 8.G.B.8.

In this race between a bird and a dog, 8th graders are provided with information about their starting locations on a map and their speeds. They are asked to predict a winner, draw the paths they might follow, decide how to determine who...

[Free Registration/Login may be required to access all resource tools.] This concept teaches students about the 30-60-90 special right triangle and how to apply its properties.

The purpose of this instructional activity is to help students apply math concepts concerning similar triangles and trigonometric functions to real life situations. The students learn how to take these concepts and use them to find...

This CoolMath resource provides an introduction to some Precalculus formulas.

Explains the basic concept of right triangles with step-by-step instructions and methods for solving specific problems on your own relating to this topic.

Learn how similar triangles have congruent corresponding angles and proportional corresponding sides.

Explore some problems you can solve with your knowledge of triangles and trigonometry.

Learn how the Law of Cosines uses the measure of angle C to provide an equation that relates the three sides of the triangle with angle C.

This lesson focuses on exponents and radicals as they apply to problems involving squares, perfect squares, and square roots.

A guide to support parents as they work with their students in similarity.

Explains how to model angles in the x,y-plane, and demonstrates how to extend the concept of trig ratios to angles larger than 90 degrees.

This site from the Pennsylvania State University provides a hands-on activity to bridge the gap between right triangles, 30-60-90 and 45-45-90 theorems, and trigonometry, and what every student wants to know, "When will I ever use this?"...

This site offers numerous activities for middle school and high school students to explore using Geometer's Sketch Pad.

Biography of Greek mathematician, Pythagoras, who lived from 569 BC to approximately 475 BC. His theory, known as the Pythagorean Theorem continues to be of interest to mathematicians and has more than 400 different proofs.