Khan Academy
Khan Academy: Use Pythagorean Theorem to Find Right Triangle Side Lengths
Find the length of the hypotenuse or a leg of a right triangle using the Pythagorean Theorem. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a video, or receive hints.
McGraw Hill
Glencoe: Self Check Quizzes 2: The Pythagorean Theorem
Test your knowledge of the Pythagorean Theorem with these practice problems. Each question has a "Hint" link to help. At the bottom of the page click the "Check It" button and the correct answer for each problem appears beside it. Also,...
Oswego City School District
Regents Exam Prep Center: Pythagorean Theorem
Material to supplement introductory instruction on the Pythagorean Theorem. A very simple look at its use in geometry, a multiple-choice quiz through which students can test themselves and check their answers, and a teacher resource...
CK-12 Foundation
Ck 12: Algebra: Pythagorean Theorem and Its Converse
[Free Registration/Login may be required to access all resource tools.] Recognize and use the Pythagorean Theorem
Education Place
Houghton Mifflin: Eduplace: What Is It? Pythagorean Theorem
This is a great place for information on the Pythagorean Theorem. Three other sections (tabs at the top) are available, including tips, students' questions, and lesson ideas.
BBC
Bbc: Pythagoras' Theorem
You can pick up some valuable pointers on how to apply the Pythagorean Theorem here. When you finish working your way through the pages you can take an on-line "Test Bite," and check your understanding.
Other
The mathlab.com: Ultimate Pythagorean Theorem Test
Open the nine clue boxes. Solve the problems inside. Each successful solution will supply you with a clue to use in the decoder grid to determine the password to claim the treasure.
Doina Popovici
Math Play: Pythagorean Theorem Jeopardy Game
This jeopardy-style game will have students calculate the sides of a right triangle by using the Pythagorean Theorem.
Doina Popovici
Math Play: Pythagorean Theorem Game
Find the unknown side in the right triangle using the Pythagorean theorem in this online game.
Alabama Learning Exchange
Alex: Pythagorean Theorem: Prove It (Part 2)
In this lesson, eighth grade middle schoolers will use their new found knowledge of the Pythagorean Theorem and relate it to the world around them. They will work in cooperative groups to solve problems using the Pythagorean Theorem....
Oswego City School District
Regents Exam Prep Center: Pythagorean Theorem
Who was Pythagoras and what is his theorem? Explore this concept and its relationship to the measurement of a right triangle in this test prep lesson plan. The lesson includes an interactive worksheet where students discover the answers...
Math Aids
Math Aids: Pythagorean Theorem Worksheets
Great resource to practice and strengthen math skills pertaining to the Pythagorean Theorem. Math worksheets are printable, may be customized, and include answer keys.
Ducksters
Ducksters: Kids Math: Pythagorean Theorem
Understand how the Pythagorean Theorem can help us solve the lengths of a triangle. Learn how it works, terms, tricks, and examples on this site.
National Council of Teachers of Mathematics
Nctm: Illuminations: Pythagorean Review
Review and explore the Pythagorean Theorem.
PBS
Pbs Learning Media: Taco Cart: A Pythagorean Journey
This interactive exercise uses distance and speed of travel to solve a real-life problem focusing on the Pythagorean theorem and rate of change.
Shodor Education Foundation
Shodor Interactivate: Interactive: Pythagorean Explorer
Students find the length of a side of a right triangle by using the Pythagorean Theorem and then check their answers.
Other
The mathlab.com: Sophia's Tree of Mysteries
There are 10 questions hidden in the tree. Click around to find them. As you find each answer, use the decoder grid below to find its matching letter to determine the required password to enter the restricted area.
Shodor Education Foundation
Shodor Interactivate: Squaring the Triangle
Students explore the relationship between the Pythagorean Theorem and right triangles. Teacher resources are included.
Government of Alberta
Learn Alberta: Math Interactives: Exploring Square Roots Video
This video illustrates the concepts of square roots, slope, and the Pythagorean Theorem as they are used in designing and constructing skate park rails, ramps, and pipes. An interactive activity is also included where students are able...
Khan Academy
Khan Academy: Right Triangle Side Lengths
Use the Pythagorean Theorem to determine if the given side lengths could form a right triangle, i.e., which set forms a Pythagorean triple. Students receive immediate feedback and have the opportunity to try questions repeatedly, watch a...
Alabama Learning Exchange
Alex: Growing in a Triangle
Middle school students explore the Pythagorean Theorem by measuring and calculating diagonal lengths using the Pythagorean Theorem. Students view an animated proof of the Pythagorean Theorem. They access an Internet site to view and...
Alabama Learning Exchange
Alex: Quilting With My Pal, Pythagoras!
In this unit lesson, students will learn about the Pythagorean Theorem and how it is evident in our everyday world. Students will apply the concept of the Pythagorean Theorem to the squares of a quilt. Each quilt square will be designed...
Texas Instruments
Texas Instruments: Try Angle?
In this activity, students investigate properties of triangles by randomly generating possible side lengths for triangles. They learn to determine if three line segments can form a triangle. They also learn to classify triangles as...
Texas Instruments
Texas Instruments: Going Out of Business
In this activity, students use the Pythagorean theorem to compute the diagonals of rectangles.