• They come in many shapes and sizes!

• 3 measure angles– Acute– Right – Obtuse

• 3 measure sides– Scalene– Isosceles– Equilateral

There are 6 types of triangles.

Isosceles Triangle

• The left and right side are 5 centimeters long.

• This triangle has at least two equal sides.

1. Equilateral Triangle

• This triangle has all congruent sides. This triangle also has the congruent angles, each being 60º.

• The bottom line wins for the longest side.

• This triangle consists of three sides that are all different.

Obtuse Triangle

• It’s the bottom triangle @ 120º.

• This triangle has one of the three angles larger than 90º.

Acute Triangle

• This triangle has all three angles measuring less than 90º. Remember that every triangle has a sum of 180º for all three angles.

The Right Triangle• This very special

triangle has one angle that is exactly 90º. The other two angles always have a sum of 90º. Everything seems RIGHT about this triangle!