Types of Triangles Review and Classifying Triangles by Sides and Angles Worksheet

A triangle is a three-sided polygon.

Triangles can be grouped into categories based on their attributes of sides and angles.

Classifying triangles by sides:

• An equilateral triangle has all sides with the same length
• An isosceles triangle has two sides with the same length
• A scalene triangle has no sides with the same length

Classifying triangles by angles:

• A right triangle has one angle equal to 90 degrees
• An obtuse triangle has one angle greater than 90 degrees
• An acute triangle has all angles less than 90 degrees

Another key fact is that all triangles have three angles whose measures always add together to be 180 degrees.

Here is a free fun activity to review the types of triangles and the associated vocabulary words. This worksheet, with accompanying word search, will help students learn to classify triangles into categories based on their properties.

>> CLICK HERE TO DOWNLOAD THE FREE TRIANGLE WORD SEARCH <<