Central Angles and Arc Measures

Front

What is a Chord?

Back

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

Front

What is a Diameter?

Back

A diameter is a chord that passes through the center of the circle, dividing it into two equal halves.

Front

What is an Arc?

Back

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

Front

What is a Minor Arc?

Back

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

Front

What is a Major Arc?

Back

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

Front

What is a Semi-Circle?

Back

A semi-circle is an arc that represents half of a circle.

Front

How do you measure an Arc?

Back

The measure of an arc is determined by the central angle that subtends it.

Front

What is the relationship between Central Angles and Arc Measures?

Back

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

Front

If the measure of arc MKL is 339 degrees, what is the measure of the central angle?

Back

The measure of the central angle is also 339 degrees.

Front

If the measure of arc CD is 90 degrees, what type of arc is it?

Back

It is a minor arc.