This is the fourth video in a series in which the instructor continues a discussion of the Pythagorean theorem. It focuses on calculations involving right triangles with 30—and 60-degree angles.

As the fourth part of a series on the Pythagorean Theorem, Sal continues an exploration of the ways to calculate the length of sides of a right triangle using algebra. He also used this theorem to solve problems involving a right...

In this video tutorial, the instructor demostrates how to apply the special relationship between the legs and hypotenuse of a 30-60-90 triangle. Solves two different example problems using the relationship. Practice problems available....

Solves an example problem in which the length of the hypotenuse is known and the length of a side must be determined. Explains the special relationship of the lengths of the sides of a 30-60-90 triangle using the Pythagorean theorem....

In this video tutorial [6:59], the instructor provides a proof for the relationship among the legs and hypotenuse of 30-60-90 triangles by breaking an equilateral triangle into two congruent triangles and using the Pythagorean threorem.

In this video tutorial [6:40], the instructor explains how to apply the relationships of the sides of a 30-60-90 triangle to solve a perimeter problem involving a rectangle that has had one of the angles trisected.

The video tutorial [12:21] demonstrates solutions to problems #66-70 of California Geometry released state test questions. Problems address basic trigonometry ratios, 30-60-90 triangles.

This video explores proving the ratios between the sides of a 30-60-90 triangle.

Students are provided an introduction to 45-45-90 triangles by watching a video tutorial.

In this video tutorial, explore the 45-45-90 and 30-60-90 triangles and what the properties of each are. Check understanding with a quiz. [6:35]

Using what we know about 30-60-90 triangles to solve what at first seems to be a challenging problem in this short video.

This lesson explains what 45-45-90 and 30-60-90 right triangles are and discusses their properties. It is 3 of 5 in the series titled "Two Special Triangles."

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 2 of 9 in the series titled "Using the 30-60-90 Rule."

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 3 of 9 in the series titled "Using the 30-60-90 Rule."

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 6 of 9 in the series titled "Using the 30-60-90 Rule."

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 7 of 9 in the series titled "Using the 30-60-90 Rule."

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 9 of 9 in the series titled "Using the 30-60-90 Rule."

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 "Using the 30-60-90 Rule."

This lesson explains what 45-45-90 and 30-60-90 right triangles are and discusses their properties. It is 2 of 5 in the series titled "Two Special Triangles."

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 4 of 9 in the series titled "Using the 30-60-90 Rule."