Angles, Triangles, and Polygons

Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex). It is measured in degrees.

Front

What is a triangle?

Back

A triangle is a polygon with three sides and three angles. The sum of the interior angles of a triangle is always 180 degrees.

Front

What is a polygon?

Back

A polygon is a closed figure formed by a finite number of straight line segments (sides) that do not cross each other.

Front

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

Back

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

Front

What is a regular polygon?

Back

A regular polygon is a polygon with all sides and all angles equal.

Front

What is the name of a 5-sided polygon?

Back

A 5-sided polygon is called a pentagon.

Front

What is the measure of each exterior angle of a regular polygon?

Back

The measure of each exterior angle of a regular polygon is 360 degrees divided by the number of sides (n).

Front

What is a heptagon?

Back

A heptagon is a polygon with seven sides and seven angles.

Front

What is the relationship between interior and exterior angles?

Back

The interior and exterior angles at each vertex of a polygon are supplementary, meaning they add up to 180 degrees.

Front

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

Back

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