Interior and Exterior Angle Flashcard

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 always 180 degrees.

Front

What is the relationship between interior and exterior angles?

Back

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

Front

How do you find the measure of an unknown angle in a triangle?

Back

Subtract the sum of the known angles from 180 degrees.

Front

What are remote interior angles?

Back

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

Front

If one interior angle of a triangle is 60 degrees, what is the sum of the other two angles?

Back

The sum of the other two angles is 120 degrees.

Front

What is the measure of each interior angle in a regular quadrilateral?

Back

Each interior angle in a regular quadrilateral (square) measures 90 degrees.

Front

How do you calculate the measure of an exterior angle?

Back

An exterior angle can be calculated by subtracting the measure of the adjacent interior angle from 180 degrees.

Front

What is the formula for the sum of the interior angles of a polygon?

Back

The sum of the interior angles of a polygon with n sides is (n-2) × 180 degrees.