8.1 - 8.3 Review

Front

What is the formula for the area of a circle?

Back

The area of a circle is calculated using the formula: A = πr², where A is the area and r is the radius.

Front

What is a minor arc in a circle?

Back

A minor arc is an arc that is smaller than a semicircle, measuring less than 180 degrees.

Front

What is a major arc in a circle?

Back

A major arc is an arc that is larger than a semicircle, measuring more than 180 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. The measure of the arc is equal to the measure of the central angle.

Front

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

Back

The arc length is directly proportional to the central angle. If the angle is in degrees, the formula is: Arc Length = (θ/360) * 2πr.

Front

What is the measure of a semicircle?

Back

A semicircle measures 180 degrees.

Front

What is the difference between an inscribed angle and a central angle?

Back

A central angle is formed by two radii and has its vertex at the center of the circle, while an inscribed angle has its vertex on the circle and is formed by two chords.

Front

What is the measure of an inscribed angle?

Back

The measure of an inscribed angle is half the measure of the intercepted arc.

Front

If the measure of arc AYB is 260°, what is the measure of the inscribed angle that intercepts arc AYB?

Back

The measure of the inscribed angle is 130°, which is half of 260°.

Front

What is the circumference of a circle?

Back

The circumference of a circle is calculated using the formula: C = 2πr, where C is the circumference and r is the radius.