4.6C Classifying Triangles by Their Angles

Front

What is an acute triangle?

Back

An acute triangle is a triangle where all three angles are less than 90 degrees.

Front

What is an obtuse triangle?

Back

An obtuse triangle is a triangle that has one angle larger than 90 degrees.

Front

What is a right triangle?

Back

A right triangle is a triangle that has one angle equal to 90 degrees.

Front

How do you classify a triangle with angles measuring 30°, 60°, and 90°?

Back

It is a right triangle.

Front

How do you classify a triangle with angles measuring 45°, 45°, and 90°?

Back

It is a right triangle.

Front

How do you classify a triangle with angles measuring 70°, 60°, and 50°?

Back

It is an acute triangle.

Front

How do you classify a triangle with angles measuring 120°, 30°, and 30°?

Back

It is an obtuse 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

Can a triangle have two obtuse angles?

Back

No, a triangle cannot have two obtuse angles because the sum of the angles would exceed 180 degrees.

Front

What type of triangle has all sides of equal length?

Back

An equilateral triangle, which is also acute.