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Naming triangles by angles

This skill involves naming triangles based on their angles. Triangles are classified as acute if all angles are less than 90 degrees, obtuse if one angle is greater than 90 degrees, and right if one angle is 90 degrees.

Learn naming triangles by angles

Teaching Transcript

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Name these triangles by their angles

If all the angles are less than 90 degrees, we call that an acute triange. Think of small as cute, so acute is small angles.

If one of the angles is greater than 90 it's called an obtuse triangle.

If one of the angles is 90 degrees, that's a right triangle.

Skill Practice

Naming triangles by angles

Test your understanding of naming triangles by angles by practicing it! Work through the below exercises to use it in practice.