Circle Vocabulary

Front

What is a circle?

Back

A circle is a closed rounded figure whose points are equidistant from the center.

Front

What does the measure of a central angle represent?

Back

The measure of a central angle is congruent to the arc it intercepts.

Front

What is a major arc?

Back

A major arc is an arc that is larger than a semicircle.

Front

What is a minor arc?

Back

A minor arc is an arc that is smaller than a semicircle.

Front

What is a semicircle?

Back

A semicircle is an arc that represents half of a circle.

Front

What is a secant line?

Back

A secant line is a line that intersects a circle at two points.

Front

How do you identify a major arc?

Back

A major arc is identified by its endpoints and is larger than a semicircle.

Front

How do you identify a minor arc?

Back

A minor arc is identified by its endpoints and is smaller than a semicircle.

Front

What is the relationship between a central angle and its intercepted arc?

Back

The measure of a central angle is equal to the measure of the intercepted arc.

Front

What is the formula for the circumference of a circle?

Back

The circumference of a circle is given by the formula C = 2πr, where r is the radius.