Maths Challenge
Maths challenge.net: Right Triangle Equal Parts
A geometry proof problem involving a right triangle and finding angles of equal measure.
Maths Challenge
Maths challenge.net: Measuring Mountains
Use your triangle solving skills to solve this triangle problem and then apply it to the real world.
Maths Challenge
Maths challenge.net: Right Angle Reasoning
A geometry problem for students to use their mathematical reasoning skills to explain a right triangle property.
Varsity Tutors
Varsity Tutors: Hotmath: Practice Problems: Right Triangles and Trigonometry
Twenty-five problems cover the topic of right triangles and trigonometry in different settings. They are given with each step to the solution cleverly revealed one at a time. You can work each step of the problem then click the "View...
That Quiz
That Quiz: Practice Test: Triangles
Test your knowledge on the attributes of triangles. There are eleven levels that may be completed with or without a timer.
Mathigon
Mathigon: Geometry: Triangles and Trigonometry: Properties of Triangles
This lesson focuses on the properties of triangles, a closed shape that has three sides, three vertices, and and three internal angles. There are different types of triangles such as a right triangle, obtuse, and acute based on the...
Cuemath
Cuemath: Right Angled Triangle
Explore and learn about the features and properties of a right triangle in this lesson. Includes examples and practice questions.
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.
Texas Instruments
Texas Instruments: Ratios in Right Triangles
The study of properties of right triangles is a major topic in mathematics. In this activity, you will investigate three common right triangle trigonometric ratios. [Requires Adobe Reader.]
Texas Instruments
Texas Instruments: Angle Theorem
Students use the Cabri Geometry II Plus software to investigate the relationship between angle and ratio in a right triangle.
Texas Instruments
Texas Instruments: Right Triangles Are Cool Because of Pythag's Rule
In this activity, students use the Geoboard to determine the length of the sides of a right triangles. [Requires Adobe Reader.]
Texas Instruments
Texas Instruments: Right Triangle Trig
This is a way to use the TI-Navigator to check for an understanding of sin, cos, and tan before you move onto word problems.
Analyze Math
Analyze Math: Special Triangles Used in Trigonometry
The trigonometry tutorial investigates special triangles. The activity includes isosceles right triangles and 30-60-90 triangles. The examples show how to obtain the six trigonometric ratios of the special angles using special triangles.
Analyze Math
Analyze Math: Similar Triangle Problems
The geometry tutorial investigates similar triangles. The activity has several examples with detailed solutions.
Maths Challenge
Maths challenge.net: Corner Circle
This is a "three star" geometry problem where prior knowledge of circles and triangles is recommended to solve this circle in the corner problem.
Ministry of Education and Universities of the Region of Murcia (Spain)
Ministerio De Educacion Y Ciencia: Demostraciones Del Teorema De Pitagoras
An interactive visual aid with a good explanation of the Pythagoras Theorem. In this unit five different demonstration will be given.
Math Planet
Math Planet: Algebra 1: The Pythagorean Theorem
Provides examples and a video lesson that illustrate the Pythagorean Theorem which provides us with the relationship between the sides in a right triangle. [4:41]
Math Planet
Math Planet: Geometry: More About Triangles
Explores triangles and related vocabulary through examples and a video lesson.
McGraw Hill
Glencoe Mathematics: Online Study Tools: Self Check Quiz on Right Triangles
The online assessment demonstrates knowledge of concepts utilized in Geometry. The multiple choice questions test students on right triangles and trigonometry.
Mangahigh
Mangahigh: Shape: Use the Pythagorean Theorem to Find the Hypotenuse
Determine the hypotenuse of a triangle with the Pythagorean theorem.
Mangahigh
Mangahigh: Shape: Use the Pythagorean Theorem
Use pythagorean theorem to solve for a missing side.
Mangahigh
Mangahigh: Shape: 3 D Trigonometry
Test your knowledge of determing the lengths and angles of right triangles.
Discovery Education
Discovery Education: Web Math: Find Out Things About a Right Triangle
Gives basic info about a right triangle. Also students can substitute values for sides or angles in order to find missing values. The method for solving is then explained.
CK-12 Foundation
Ck 12: Trigonometry:lengths of Triangle Sides Using the Pythagorean
[Free Registration/Login may be required to access all resource tools.] Find the length of sides of right triangles using the Pythagorean Theorem.