Interior and Exterior Angles

Front

What is an interior angle?

Back

An interior angle is an angle formed between two sides of a polygon that is inside the polygon.

Front

What is an exterior angle?

Back

An exterior angle is an angle formed between one side of a polygon and the extension of an adjacent side.

Front

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

Back

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

Front

What is the relationship between interior and exterior angles?

Back

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

Front

Define corresponding angles.

Back

Corresponding angles are pairs of angles that are in similar positions at each intersection where a straight line crosses two others.

Front

Define alternate interior angles.

Back

Alternate interior angles are pairs of angles that are on opposite sides of the transversal and inside the two lines.

Front

Define vertical angles.

Back

Vertical angles are the angles opposite each other when two lines cross. They are always equal.

Front

If two angles are supplementary, what is their sum?

Back

The sum of supplementary angles is 180 degrees.

Front

If two angles are complementary, what is their sum?

Back

The sum of complementary angles is 90 degrees.

Front

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

Back

Each angle in an equilateral triangle measures 60 degrees.