These lessons help Grade 8 students to learn about the 30-60-90 special right triangle.
45-45-90 Right Triangle
Other Special Right Triangles
More lessons for Grade 7 and Grade 8
A 30-60-90 triangle is a special type of right triangle. What is special about 30-60-90 triangles is that the sides of the 30-60-90 triangle always have the same ratio. Therefore, if we are given one side we are able to easily find the other sides using the ratio of 1:2:√3. Another special right triangle is the 45-45-90 triangle.
The following diagram shows the properties of a 30-60-90 Triangle. Scroll down the page for more examples and solutions on how to solve 30-60-90 Triangles.
How to find the legs and hypotenuse in 30-60-90 triangles when given: the short leg, the long leg, or the hypotenuse.
Solve a 30-60-90 Right Triangle
This video provides examples of how to solve a 30-60-90 triangle given the length of one side.
Finding the Missing Side of 30-60-90 Triangle
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