Pythagorean Theorem Teacher Resources

Find Pythagorean Theorem lesson plans and worksheets
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Mathpages.com: History of Mathematics

For Students 9th - 10th
Find the information you need about math history, from Archimedes to Fermat. A great resource for studying the foundations of today's world of mathematics.
eBook
Mathigon

Mathigon: Geometry: Triangles and Trigonometry: Pythagoras' Theorem

For Students 9th - 10th Standards
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)
Handout
Wikimedia

Wikipedia: Pythagorean Triple

For Students 9th - 10th Standards
This Wikipedia article explains a Pythagorean triple -- the triangle formed by three positive integers. Includes examples and hyperlinked terms.
Unit Plan
CK-12 Foundation

Ck 12: Pythagorean Triples

For Students 9th - 10th
[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...
Instructional Video
Sophia Learning

Sophia: Finding the Missing Side of a Pythagorean Triple: Lesson 7

For Students 9th - 10th
This lesson demonstrates how to recognize a Pythagorean triple when you have the lengths of two sides of a right triangle. It is 7 of 10 in the series titled "Finding the Missing Side of a Pythagorean Triple."
eBook
CK-12 Foundation

Ck 12: Algebra Ii: 4.8 Pythagorean Identities

For Students 9th - 10th Standards
This section explores the Pythagorean Identity and how it applies to right triangles set inside unit circles, in terms of sine, cosine, and tangent functions.
eBook
CK-12 Foundation

Ck 12: Interactive Geometry: 6.6 Theorems Involving Similarity

For Students 9th - 10th Standards
Learn the many theorems about triangles that you can prove using similar triangles.
Instructional Video
Sophia Learning

Sophia: Triangle Congruence Theorem (Hl)

For Students 9th - 10th
This video lesson introduces and provides examples of the Hypotenuse-Leg Triangle Congruence Theorem. Students can check their understanding with an assessment.
Handout
World History Encyclopedia

World History Encyclopedia: Greek Mathematics

For Students 9th - 10th
Discusses the major cultural influences on the development of mathematics in ancient Greece, and how the Greeks went on to surpass those cultures. The work of the Pythagoreans and of Euclid are described, along with some famous...
Lesson Plan
Ministry of Education and Universities of the Region of Murcia (Spain)

Ministerio De Educacion Y Ciencia: El Teorema De Pitagoras

For Teachers 9th - 10th Standards
Interactive resources and activities that could be used in the classroom either as an introduction or review to a unit dealing with the Pythagoras Theorem. [Requires Java.]
Activity
Ministry of Education and Universities of the Region of Murcia (Spain)

Ministerio De Educacion Y Ciencia: El Teorema De Pitagoras

For Students 9th - 10th Standards
In Spanish. In this interactive activity you can learn and understand the concept of the Pythagoras theorem.
Activity
Ministry of Education and Universities of the Region of Murcia (Spain)

Ministerio De Educacion Y Ciencia: Demostraciones Del Teorema De Pitagoras

For Students 9th - 10th Standards
An interactive visual aid with a good explanation of the Pythagoras Theorem. In this unit five different demonstration will be given.
Activity
Texas Instruments

Texas Instruments: Numb3 Rs: To Pythagoras and Beyond

For Teachers 9th - 10th Standards
Based off of the hit television show NUMB3RS, this lesson has students discover the Pythagorean relationships of different triangle types. By the end of the lesson, students should be able to take three given side lengths and compute...
Handout
Wikimedia

Wikipedia: Pythagoras

For Students 9th - 10th
Encyclopedia article about Pythagoras that looks at his life, accomplishments, and his influence on other mathematicians. Includes pictures and links to additional information.
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Distance Formula in the Coordinate Plane

For Students 9th - 10th Standards
[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...
Website
National Council of Teachers of Mathematics

The Math Forum: Famous Problems in the History of Mathematics

For Students 9th - 10th
On this site, there are several math problems to explore and solve. Look through some solutions by famous mathematicians and expand your thinking about some interesting math concepts. Teachers of elementary grades may want to use this...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Distance Formula in the Coordinate Plane

For Students 9th - 10th Standards
[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...
Unit Plan
CK-12 Foundation

Ck 12: Geometry: Distance Between Parallel Lines

For Students 9th - 10th Standards
[Free Registration/Login may be required to access all resource tools.] In this lesson students find the distance between two parallel lines. Students examine guided notes, review guided practice, watch instructional videos and attempt...
Lesson Plan
Illustrative Mathematics

Illustrative Mathematics: G Co Inscribing a Square in a Circle

For Teachers 9th - 10th Standards
In this lesson, students learn how to inscribe a square in a circle. Aligns with G-CO.D.13
Instructional Video
Sophia Learning

Sophia: Solving for Radii and Tangent Segments

For Students 9th - 10th
Solve for the unknown radii and tangent segments of circles using a theorem. Assess learning with a quiz.
Activity
Math Medics

S.o.s. Math: The Polar Form of a Complex Number

For Students 9th - 10th Standards
This lesson from S.O.S. Math provides great information on the polar form of a complex numbers. It has many formulas and examples, and it also discusses the polar coordinates as well. Links are provided for additional subjects.
Handout
Other

Dans Math: Lessons: Trigonometry

For Students 9th - 10th
College professor Dan Bach reviews basic trig concepts, including trig functions, right triangles, circles, radians, and polar coordinates. Site includes animated graphs and detailed examples.
Instructional Video
Sophia Learning

Sophia: Finding the Missing Side of a 45 45 90 Triangle: Lesson 1

For Students 9th - 10th
In this lesson, you'll learn how to use the lengths of two sides of a triangle and the ratio of the side lengths to find the length of the missing side. It is 1 of 9 in the series titled "Finding the Missing Side of a 45-45-90 Triangle."
Instructional Video
Sophia Learning

Sophia: Finding the Missing Side of a 45 45 90 Triangle: Lesson 8

For Students 9th - 10th
In this lesson, you'll learn how to use the lengths of two sides of a triangle and the ratio of the side lengths to find the length of the missing side. It is 8 of 9 in the series titled "Finding the Missing Side of a 45-45-90 Triangle."

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