45-45-90 and 30-60-90 Triangles

Name: 45-45-90 and 30-60-90 Triangles
Author: Insta~Lesson

10th Grade · Math · 45 min

Lesson Preview

I can calculate the side lengths of 45-45-90 and 30-60-90 triangles.

1
A 45-45-90 triangle is also known as a right isosceles triangle because it has a right angle and two equal sides.
2
In a 45-45-90 triangle, if both legs are length x, the hypotenuse is equal to x√2.
3
The ratio of the sides in a 45-45-90 triangle is 1 to 1 to √2.

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