Interior and Exterior Triangle Angles

Front

What is the sum of the interior angles in a triangle?

Back

180 degrees.

Front

If one angle of a triangle is 90 degrees and another is 45 degrees, what is the measure of the third angle?

Back

45 degrees.

Front

What is the exterior angle of a triangle?

Back

An exterior angle is equal to the sum of the two opposite interior angles.

Front

If the interior angles of a triangle are 60 degrees, 70 degrees, and x degrees, what is the value of x?

Back

50 degrees.

Front

What is the relationship between the interior and exterior angles of a triangle?

Back

The exterior angle is equal to the sum of the two non-adjacent interior angles.

Front

If a triangle has angles measuring 30 degrees and 60 degrees, what is the measure of the third angle?

Back

90 degrees.

Front

What is the formula to find the sum of the interior angles of a polygon?

Back

(n-2) * 180 degrees, where n is the number of sides.

Front

In a triangle, if one angle measures 120 degrees, what can you say about the other two angles?

Back

They must each be less than 60 degrees.

Front

What is the measure of an angle that is supplementary to a 75-degree angle?

Back

105 degrees.

Front

If the angles of a triangle are in the ratio 2:3:4, what are the measures of the angles?

Back

40 degrees, 60 degrees, and 80 degrees.