**Lengths of Sides in an Isosceles Right Triangle**

*****Remember that the you can find out if the triangle is a right triangle using the Pythagoream Theorem*

** Isosceles Right Triangle:** An

*isosceles right triangle*is a triangle with one angle equal to ninety degrees and each of the other two angles equal to forty five degrees.

**Relationship of Sides in a 30-60-90 Triangle**

**30-60-90 Triangle:** A ** 30-60-90 Triangle:** is a triangle with one angle equal to ninety degrees, one angle equal to thirty degrees, and one angle equal to sixty degrees.

**Special Triangle Ratios**

**Special Triangle:** A special triangle is a triangle that has particular internal angles that cause the sides to have a certain length relationship with each other.

What are some special triangles that can be identified?

The ratio of the sides of an isosceles right triangle is** **

The ratio of the sides of a 30-60-90 right triangle is** **