Interior/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

How do you calculate the sum of interior angles of a polygon?

Back

The sum of the interior angles of a polygon can be calculated using the formula: (n - 2) × 180°, where n is the number of sides.

Front

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

Back

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

Front

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

Back

The third angle measures 90°.

Front

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

Back

Each interior angle in a regular hexagon measures 120°.

Front

What is the measure of each exterior angle in a regular pentagon?

Back

Each exterior angle in a regular pentagon measures 72°.

Front

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

Back

To find the measure of an unknown angle in a triangle, subtract the sum of the known angles from 180°.

Front

What is the formula for calculating the exterior angle of a triangle?

Back

The exterior angle of a triangle is equal to the sum of the two opposite interior angles.

Front

If one interior angle of a polygon is 150°, what can you say about the polygon?

Back

If one interior angle is 150°, the polygon must be a concave polygon.