4.6C Classifying Triangles by Their Angles

Front

What is an acute triangle?

Back

A triangle where all 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 larger than 90 degrees.

Front

Classify a triangle with angles measuring 30°, 60°, and 90°.

Back

Right triangle.

Front

Classify a triangle with angles measuring 45°, 45°, and 90°.

Back

Right triangle.

Front

Classify a triangle with angles measuring 70°, 60°, and 50°.

Back

Acute triangle.

Front

Classify a triangle with angles measuring 120°, 30°, and 30°.

Back

Obtuse triangle.

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 that is greater than 90 degrees?

Back

Obtuse triangle.