Classifying Triangles Review

A triangle is a three-sided polygon.

1. Equilateral Triangle: All sides are equal. 2. Isosceles Triangle: Two sides are equal. 3. Scalene Triangle: All sides are different.

1. Acute Triangle: All angles are less than 90°. 2. Right Triangle: One angle is exactly 90°. 3. Obtuse Triangle: One angle is greater than 90°.

An equilateral triangle has all three sides equal and all three angles equal to 60°.

An isosceles triangle has at least two sides that are equal in length.

A scalene triangle has all sides of different lengths.

An acute triangle has all angles measuring less than 90°.

A right triangle has one angle that measures exactly 90°.

An obtuse triangle has one angle that measures more than 90°.

It is a right triangle.