Arcs and Angles Circles

Front

What is an angle?

Back

An angle is formed by two rays that meet at a point called the vertex.

Front

What is a circle?

Back

A circle is a round shape where all points are the same distance from the center.

Front

What is the measure of a right angle?

Back

A right angle measures 90 degrees.

Front

What is an arc?

Back

An arc is a part of the circumference of a circle.

Front

What is the measure of a full circle?

Back

A full circle measures 360 degrees.

Front

What is the measure of a straight angle?

Back

A straight angle measures 180 degrees.

Front

What is the center of a circle?

Back

The center of a circle is the point that is equidistant from all points on the circle.

Front

What is a degree?

Back

A degree is a unit of measurement for angles.

Front

What is the relationship between angles and arcs in a circle?

Back

The measure of an angle at the center of a circle is equal to the measure of the arc it intercepts.

Front

What is a chord in a circle?

Back

A chord is a line segment whose endpoints lie on the circle.