Wolfram Research
Wolfram Math World: Heron's Formula
This site provides a detailed overview of Heron's Formula. Content includes a definition, example, and formula.
University of Saskatchewan (Canada)
University of Saskatchewan: Geometry
The University of Saskatchewan's Department of Mathematics and Statistics provides high school students with online tutorials and exercises on what they deem some of the most important topics in geometry: Triangles, and Circles and Other...
University of Saskatchewan (Canada)
University of Saskatchewan: Trigonometric Functions
This site examines the six trigonometric functions from a right triangle point of view. Provides information, examples, and lots of exercises for understanding.
Other
Platonic Realms: Conics
This resource provides in depth information on the conic sections. Click on the underlined words for definitions and diagrams.
McGraw Hill
Glencoe: Self Check Quizzes 3 the Pythagorean Theorem
Use Glencoe's Math Course 3 randomly generated self-checking quiz to test your knowledge of The Pythagorean Theorem. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page click the...
McGraw Hill
Glencoe: Self Check Quizzes 3 Using the Pythagorean Theorem
Use Glencoe's Math Course 3 randomly generated self-checking quiz to test your knowledge of using the Pythagorean Theorem. Each question has a "Hint" link to help. Choose the correct answer for each problem. At the bottom of the page...
McGraw Hill
Glencoe: Self Check Quizzes the Pythagorean Theorem
Students answer multiple choice questions about the Pythagorean Theorem. The questions questions are self-checking and hints are provided.
National Council of Teachers of Mathematics
Nctm: Illuminations: Proof Without Words: Pythagorean Theorem
Students use this computer applet to visualize the Pythagorean Theorem.
TeachEngineering
Teach Engineering: Catching the Perfect Sar Waves!
Students learn the importance of the Pythagorean theorem as applied in radar imaging. They use a sensor unit with IRED (infrared emitting diode) to measure triangle distances and the Pythagorean theorem to calculate and verify distances....
TeachEngineering
Teach Engineering: Stay in Shape
In this activity, students will learn that math is important in navigation and engineering. Ancient land and sea navigators started with the most basic of navigation equations (Speed x Time = Distance). Today, navigational satellites use...
TeachEngineering
Teach Engineering: Handheld Trigonometry
In addition to understanding the concept of similar right triangles and how they apply to trigonometric ratios, students explore a clinometer app, and discover how it can be used to test the mathematics underpinning trigonometry.
Texas Education Agency
Texas Gateway: Using the Pythagorean Theorem
The student will use triangle relationships to prove the Pythagorean Theorem and solve problems.
Texas Education Agency
Texas Gateway: Using the Pythagorean Theorem to Solve Indirect Measurements
Given real-life problems, the student will use the Pythagorean Theorem to solve the problems.
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.
Exploratorium
Exploratorium: Pi Day
Pi Day is celebrated on March 14 in honor of the never-ending value of pi (3.1415926) The renowned museum, Exploratorium, presents a history of Pi and offers links to Pi-related activities.
Other
Algebra Class: Solving and Graphing a Quadratic Equation
Math teacher provides a unit on quadratic equations in which she explains the concepts of solving and graphing quadratic equations through numerous examples and graphs. Hyperlinks are available to each step that ultimately leads to...
Other
Achieve: Miniature Golf Design Task [Pdf]
In this task students are asked to combine numerous skills to create a miniature golf hole. Students create a scale drawing of the hole, calculate the area of the hole and determine the percentage of total area used. In addition,...
Texas Education Agency
Texas Gateway: Demonstrating the Pythagorean Theorem
Given pictures or models that represent the Pythagorean Theorem, the student will demonstrate an understanding of the theorem.
Texas Education Agency
Texas Gateway: Applying Pythagorean Triples to Solve Problems
Given verbal and pictorial representations of problem situations, the student will apply patterns from right triangles whose sides are Pythagorean Triples to solve the problems.
Government of Alberta
Learn Alberta: Math Interactives: Exploring the Pythagorean Theorem
This multimedia Learn Alberta math resource looks at the structural design of buildings and how the Pythagorean Theorem is often involved in the design process. The accompanying interactive component asks students to build a variety of...
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.
CK-12 Foundation
Ck 12: Interactive Middle School Math 8 for Ccss
A complete CCSS Grade 8 Mathematics course that includes interactives in every lesson, plus videos, hands-on activities, and questions with immediate feedback. Every lesson also has specifically chosen 'Related Modalities' that teach the...
Cuemath
Cuemath: Pythagoras Theorem
In this lesson, you will learn about the Pythagoras theorem, its derivations, and equations followed by solved real-world problems on the Pythagoras theorem triangle and squares.
Cuemath
Cuemath: Triangles
Explore everything about triangles. Learn about the different types, important properties, and how to find its area and perimeter. Check out the solved examples and interactive questions for better understanding.