Triangle Sum Theorem

Front

What is the Triangle Sum Theorem?

Back

The Triangle Sum Theorem states that the sum of the interior angles of a triangle is always 180 degrees.

Front

If one angle of a triangle is 49 degrees and the other two angles are equal, what are the measures of the other two angles?

Back

Each of the other two angles measures 65.5 degrees.

Front

What is the sum of the angles in a triangle?

Back

The sum of the angles in a triangle is 180 degrees.

Front

If a triangle has angles measuring 70 degrees and 75 degrees, what is the measure of the third angle?

Back

The third angle measures 35 degrees.

Front

If a triangle has angles measuring 71 degrees and 49 degrees, what is the measure of the third angle?

Back

The third angle measures 60 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

How do you find a missing angle in a triangle?

Back

To find a missing angle, subtract the sum of the known angles from 180 degrees.

Front

If a triangle has one angle measuring 90 degrees, what type of triangle is it?

Back

It is a right triangle.