Circle Properties Review

Front

What is m∠ACB?

Back

22.5°

Front

A ____ angle is an angle whose vertex is at the center of a circle.

Back

central

Front

What is the value of x?

Back

20

Front

Using Intersecting chords theorem, solve for X: If the lengths of the segments are 2 and 4, what is X?

Back

8

Front

Determine the value of x using the information in the diagram: If the angle measures are 40° and x, what is x?

Back

140°

Front

What is the formula for the circumference of a circle?

Back

C = 2πr, where r is the radius.

Front

What is the area of a circle?

Back

A = πr², where r is the radius.

Front

What is a tangent to a circle?

Back

A line that touches the circle at exactly one point.

Front

What is the relationship between the radius and diameter of a circle?

Back

The diameter is twice the length of the radius.

Front

What is the inscribed angle theorem?

Back

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