30-60-90 Triangle Ratios
10th Grade · Math · 45 min
Lesson Preview
Learning Objective
I can determine the side lengths of a 30-60-90 triangle using the ratio relationships.
- 1
In a 30-60-90 triangle, the side opposite the 30-degree angle is always half the length of the hypotenuse.
- 2
In a 30-60-90 triangle, the side opposite the 60-degree angle is equal to √3/2 times the length of the hypotenuse.
- 3
To rationalize a denominator that includes a square root, multiply both the numerator and the denominator by the square root in the denominator.
