# Special Triangles

- Author:
- rogerp@sthelens.k12.or.us

- Topic:
- Triangles

## Special triangle 1

The triangle below is a 30-60-90 triangle because it's angles are 30 60 and 90.
The sides have been measured for you and there are two ratios. Ratio a is AB/BC, and
ratio b is AC/BC.

What happens to the ratios when you drag point B and change the triangle?

Special triangle two is shown below it is a 45 45 90 since it's angles are 45 45 and 90.
The measures of the sides are given and one ratio that is EC/EB.

What happens to the ratio when you drag a vertice point and change the triangle?