University of Georgia
University of Georgia: Inter Math: Recommended Investigations of the Triangle
Investigate the qualities of a triangle with these seventeen word problems. Many include ways to extend the lesson.
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...
Northeast Parallel Architectures Center, Syracuse University
Npac Reu Program: Distance Formula
Northeast Parallel Architectures Center at Syracuse University provides a brief description of the distance formula, including two worked examples. One example, shows how the distance formula connects to the Pythagorean Theorem.
Illustrative Mathematics
Illustrative Mathematics: F Tf Special Triangles 1
Using known facts about the unit circle and isosceles triangles together with the Pythagorean Theorem, students can derive the sine and cosine of special angles. Aligns with HSF-TF.A.3.
Illustrative Mathematics
Illustrative Mathematics: F Tf Special Triangles 2
Using known facts about the unit circle and isosceles triangles together with the Pythagorean Theorem, students can derive the sine and cosine of special angles. Aligns with HSF-TF.A.3.
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...
CK-12 Foundation
Ck 12: Geometry: Distance Formula in the Coordinate Plane
[Free Registration/Login may be required to access all resource tools.] This concept teaches students how to find the distance between two points using the distance formula. Students examine guided notes, review guided practice, watch...
CK-12 Foundation
Ck 12: Geometry: Distance Formula in the Coordinate Plane
[Free Registration/Login may be required to access all resource tools.] In this lesson students use the Distance Formula to find the distance between two points. Students examine guided notes, review guided practice, watch instructional...
Northeast Parallel Architectures Center, Syracuse University
Npac Reu Program: The Distance Formula
Northeast Parallel Architecture Center, Syracuse University, provides a lesson on finding the distance between two points using the coordinates and Pythagorean Theorem.
Wikimedia
Wikipedia: Pythagorean Triple
This Wikipedia article explains a Pythagorean triple -- the triangle formed by three positive integers. Includes examples and hyperlinked terms.
Mathigon
Mathigon: Geometry: Triangles and Trigonometry: Pythagoras' Theorem
Pythagoras' Theorem: In any right-angled triangle, the square of the length of the hypotenuse (the side that lies opposite the right angle) is equal to the sum of the squares of the other two sides. (A+B=C)
CK-12 Foundation
Ck 12: Pythagorean Triples
[Free Registration/Login Required] Students explore the concept of pythagorean triples by navigating through the interactive learning module and then answering questions that go along with the module. Students can also learn more about...
Illustrative Mathematics
Illustrative Mathematics: G Srt, G Mg How Far Is the Horizon?
Some friends are at the beach looking out onto the ocean on a clear day and they wonder how far away the horizon is. A second problem asks how far the horizon would be from the top of a mountain. Students must also answer a question...
National Council of Teachers of Mathematics
The Math Forum: Vector Length
Describes how to use the Pythagorean Theorem to find the length, or magnitude, of a vector.
Physics Classroom
The Physics Classroom: Motion and Forces in Two Dimensions: Vector Addition
An extensive discussion of vector addition with links to interactives and exercises.
Alabama Learning Exchange
Alex: Growing in a Triangle
Middle school middle schoolers 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...
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...
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: El Teorema De Pitagoras
In this unit you can gain some knowledge about the Pythagorean Theorem. You can learn about the famous mathematician, familiarize with the theorem and then use your knowledge to find the area of plane figures.
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...
Math Open Reference
Math Open Reference: Biography of Pythagoras
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.
Other
Gobierno De Navarra: Teorema De Pitagoras
Interactive figures to learn about the Pythagorean Theorem.
Texas Instruments
Texas Instruments: Going Out of Business
In this activity, students use the Pythagorean theorem to compute the diagonals of rectangles.
Mangahigh
Mangahigh: Pyramid Panic: Basic Shapes to Advanced Geometry
Guide a mummy safely through the burial chambers of a pyramid as you solve length and area problems in basic to advanced geometry. There are four game zones that deal with circles and triangles, quadrilaterals, the Pythagorean Theorem,...
Illustrative Mathematics
Illustrative Mathematics: G Gpe Squares on a Coordinate Grid
The purpose of this task is to use the Pythagorean Theorem and knowledge about quadrilaterals in order to construct squares of different sizes on a coordinate grid. Aligns with G-GPE.B.7.