Classify Triangles by Angles

Front

What is an acute triangle?

Back

A triangle where all three angles are less than 90 degrees.

Front

What is an obtuse triangle?

Back

A triangle that has one angle greater than 90 degrees.

Front

What is a right triangle?

Back

A triangle that has one angle exactly equal to 90 degrees.

Front

What is an equilateral triangle?

Back

A triangle where all three sides and all three angles are equal.

Front

What is an angle?

Back

A figure formed by two rays, called the sides of the angle, sharing a common endpoint called the vertex.

Front

How do you classify triangles by angles?

Back

Triangles can be classified as acute, obtuse, or right based on their angles.

Front

What is the sum of angles in any triangle?

Back

The sum of the interior angles in a triangle is always 180 degrees.

Front

If a triangle has one angle of 90 degrees, what type of triangle is it?

Back

It is a right triangle.

Front

If a triangle has all angles less than 90 degrees, what type of triangle is it?

Back

It is an acute triangle.

Front

If a triangle has one angle greater than 90 degrees, what type of triangle is it?

Back

It is an obtuse triangle.