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Videos, worksheets, stories, and solutions to help Grade 8 students learn about the special right triangles :45-45-90, 30-60-90.

Solving Special Right Triangles

When solving special right triangles, remember that a 30-60-90 triangle has a hypotenuse twice as long as one of the sides, and a 45-45-90 triangle has two equal sides. Memorize rules that relate to special right triangles

If you are given one side of a 45-45-90 triangle or one side of a 30-60-90 triangle, you have enough information to solve for each of the two missing sides. This video shows how to do it, going from smaller sides to larger sides and larger sides to smaller sides. It also shows how the found sides can be used to find the perimeter and area of the right triangle.

How to find the missing sides of right triangles using the relationships of sides for 30-60-90 right triangles, 45-45-90 right triangles, and 3-4-5 right triangles

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