Classifying Triangles by Angles

Front

What type of triangle has all angles less than 90 degrees?

Back

Acute triangle

Front

What type of triangle has one angle that is exactly 90 degrees?

Back

Right triangle

Front

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

Back

Obtuse triangle

Front

An acute triangle is a triangle where...

Back

all angles are less than 90 degrees.

Front

A right triangle is defined by having...

Back

one angle that is exactly 90 degrees.

Front

An obtuse triangle is defined by having...

Back

one angle that is larger than 90 degrees.

Front

If a triangle has angles measuring 30°, 60°, and 90°, what type of triangle is it?

Back

Right triangle

Front

If a triangle has angles measuring 45°, 45°, and 90°, what type of triangle is it?

Back

Right triangle

Front

If a triangle has angles measuring 70°, 60°, and 50°, what type of triangle is it?

Back

Acute triangle

Front

If a triangle has angles measuring 120°, 30°, and 30°, what type of triangle is it?

Back

Obtuse triangle