Classify Triangles by Angles

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 equal to 90 degrees.

Front

What is an acute triangle?

Back

A triangle that has all angles less than 90 degrees.

Front

How do you classify a triangle with one angle greater than 90 degrees?

Back

It is classified as an obtuse triangle.

Front

How do you classify a triangle with one angle equal to 90 degrees?

Back

It is classified as a right triangle.

Front

How do you classify a triangle with all angles less than 90 degrees?

Back

It is classified as an acute triangle.

Front

What type of triangle has three equal sides?

Back

An equilateral triangle.

Front

What type of triangle has two equal sides?

Back

An isosceles triangle.

Front

What is the sum of the angles in any triangle?

Back

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

Front

If a triangle has one angle of 90 degrees, what can you say about the other two angles?

Back

The other two angles must add up to 90 degrees.