interior and exterior angles in a triangle

Front

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

Back

180 degrees

Front

What is an exterior angle of a triangle?

Back

An exterior angle is formed by one side of the triangle and the extension of an adjacent side.

Front

How do you calculate the measure of an exterior angle?

Back

The measure of an exterior angle is equal to the sum of the two remote interior angles.

Front

What are remote interior angles?

Back

Remote interior angles are the two angles inside the triangle that are not adjacent to a given exterior angle.

Front

If one angle of a triangle is 90 degrees, what are the measures of the other two angles?

Back

The other two angles must sum to 90 degrees.

Front

What is the relationship between an exterior angle and its adjacent interior angle?

Back

The exterior angle is equal to the sum of the two remote interior angles.

Front

If angle A is 30 degrees and angle B is 60 degrees, what is angle C in triangle ABC?

Back

Angle C is 90 degrees.

Front

What is the formula to find the missing angle in a triangle?

Back

180 - (sum of the known angles) = missing angle.

Front

In triangle XYZ, if angle X is 40 degrees and angle Y is 70 degrees, what is angle Z?

Back

Angle Z is 70 degrees.

Front

What is the definition of an acute angle?

Back

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