Videos, worksheets, stories and songs to help Grade 8 students learn about the 45-45-90 special right triangle.

Related Topics:

More lessons for Grade 7 and Grade 8

Math Worksheets

45-45-90 Triangles

A 45-45-90 triangle is a special type of isosceles right triangle where the two legs are congruent to one another and the non-right angles are both equal to 45 degrees. Many times, we can use the Pythagorean theorem to find the missing legs or hypotenuse of 45-45-90 triangles. The ratio of the sides to the hypotenuse is always 1:1:square root of two.

This video explains in more detail about the 45-45-90 special right triangle. It also solves 3 different 45-45-90 right triangle problems that you will come across in your geometry class.

This video provides examples of how to solve a 45-45-90 triangle given the length of one side.

Rotate to landscape screen format on a mobile phone or small tablet to use the **Mathway** widget, a free math problem solver that **answers your questions with step-by-step explanations**.

You can use the free Mathway calculator and problem solver below to practice Algebra or other math topics. Try the given examples, or type in your own problem and check your answer with the step-by-step explanations.