Circles and Arcs

Front

What is a major arc?

Back

A major arc is an arc that measures more than 180 degrees.

Front

What is a minor arc?

Back

A minor arc is an arc that measures less than 180 degrees.

Front

What is a semicircle?

Back

A semicircle is an arc that measures exactly 180 degrees.

Front

How do you determine if an arc is a major arc, minor arc, or semicircle?

Back

By measuring the angle of the arc: if > 180° it's major, if < 180° it's minor, if = 180° it's a semicircle.

Front

What is the measure of Arc DEB if it is a semicircle?

Back

180 degrees.

Front

If Arc AB is a minor arc, what can you say about its measure?

Back

It measures less than 180 degrees.

Front

What is the measure of Arc EF if it is given as 70 degrees?

Back

Arc EF is a minor arc.

Front

If Arc CD measures 52 degrees, what type of arc is it?

Back

Arc CD is a minor arc.

Front

What is the total measure of a circle in degrees?

Back

360 degrees.

Front

How do you find the measure of an arc in a circle?

Back

The measure of an arc can be found using the central angle that subtends the arc.