Circle Review 1

Front

What is the measure of a full circle in degrees?

Back

360 degrees.

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where r is the radius.

Front

What is the formula for the area of a circle?

Back

A = πr², where r is the radius.

Front

What is an arc in a circle?

Back

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

Front

How do you find the measure of an arc?

Back

The measure of an arc is equal to the central angle that subtends it.

Front

What is a chord in a circle?

Back

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

Front

What is the relationship between the central angle and the arc length?

Back

The arc length is proportional to the central angle.

Front

What is the measure of a semicircle?

Back

180 degrees.

Front

What is the relationship between inscribed angles and intercepted arcs?

Back

An inscribed angle is half the measure of its intercepted arc.

Front

What is the formula for the area of a sector of a circle?

Back

Area = (θ/360) * πr², where θ is the central angle in degrees.