Identifying Types of Triangles by Angles

Types of triangles based on their angles
• A RIGHT triangle has one 90^o angle.
• An OBTUSE triangle has one angle that is greater than 90^o.
• An ACUTE triangle has all three angles less than 90^o.

Identifying Triangles by their Sides

Types of triangles based on their sides
• An EQUILATERAL triangle has all three sides the same length.
• An ISOSCELES triangle has two sides with the same length.
• A SCALENE triangle has all three sides different lengths.