Angle measures in Triangles

Front

What is the sum of the angles inside a triangle?

Back

180 degrees.

Front

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

Back

Right triangle.

Front

What is the measure of each angle in an equilateral triangle?

Back

60 degrees.

Front

What is the relationship between the angles in a triangle?

Back

The sum of the interior angles is always 180 degrees.

Front

If two angles in a triangle measure 45 degrees each, what is the measure of the third angle?

Back

90 degrees.

Front

What is an obtuse angle?

Back

An angle that measures more than 90 degrees but less than 180 degrees.

Front

What is an acute angle?

Back

An angle that measures less than 90 degrees.

Front

What is the measure of a straight angle?

Back

180 degrees.

Front

In a triangle, if one angle measures 120 degrees, what type of triangle is it?

Back

Obtuse triangle.

Front

What is the exterior angle theorem?

Back

The exterior angle of a triangle is equal to the sum of the two opposite interior angles.