Classify Triangles by Angle

Front

What are the three main types of triangles classified by their angles?

Back

Acute, Right, Obtuse.

Front

What is an acute triangle?

Back

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

Front

What is a right triangle?

Back

A triangle that has one angle equal to 90 degrees.

Front

What is an obtuse triangle?

Back

A triangle that has one angle greater than 90 degrees.

Front

How can you identify an acute triangle?

Back

By measuring the angles; all must be less than 90 degrees.

Front

What is the sum of the angles in any triangle?

Back

180 degrees.

Front

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

Back

It is a right triangle.

Front

Can a triangle be both acute and obtuse?

Back

No, a triangle cannot be both acute and obtuse at the same time.

Front

What type of triangle has one angle greater than 90 degrees?

Back

An obtuse triangle.

Front

What is the classification of a triangle with angles measuring 30°, 60°, and 90°?

Back

It is a right triangle.