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This section explores the relationship between right triangles, circles, and trigonometry. It investigates how a right triangle that is set inside a circle and rotates around the circle is connected to trigonometric functions and their...

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...

Use this tutorial to revisit right triangle trigonometry.

The converse of the Pythagorean Theorem is examined through examples and a video lesson. [1:04]

Learn about the types of triangles by taking a look at an example and a video lesson.

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]

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.

Define the trigonometric ratios in terms of ratios of the sides of a right triangle.

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)

This section explores right triangles with three lengths that are considered Pythagorean Triples, and also investigates how some right triangles can have lengths that are not Pythagorean Triples.

Activities in this lesson explore how to identify the coordinates where special right triangles intersect with the unit circle in all four quadrants, use both degrees and radians to identify angles, and explore angles of different sizes...

Learn all about the Pythagorean Theorem by viewing examples and a video lesson.

Explore and understand tangent ratios.

The geometric mean is explained through examples and a video lesson. [1:12]

Provides an explanation, examples, and a video lesson all related to square roots and real numbers. [1:59]

Learn about trigonometry by viewing examples and a video lesson.