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

A triangle with angles measuring 30°, 60°, and 90° is classified as what type?

Back

Right triangle

Front

A triangle with angles measuring 45°, 45°, and 90° is classified as what type?

Back

Right triangle

Front

A triangle with angles measuring 70°, 60°, and 50° is classified as what type?

Back

Acute triangle

Front

A triangle with angles measuring 120°, 30°, and 30° is classified as what type?

Back

Obtuse triangle

Front

What is the sum of the angles in any triangle?

Back

180 degrees

Front

If a triangle has one angle measuring 100 degrees, what type of triangle is it?

Back

Obtuse triangle

Front

What type of triangle has all sides of equal length?

Back

Equilateral triangle