Circles Review

Front

What is the standard equation of a circle with center (0,0) and radius 3?

Back

x² + y² = 9

Front

What is the value of 'x' if the equation is x + 2 = 8?

Back

6

Front

Which graph corresponds to the equation (x)² + (y-6)² = 9?

Back

Graph B

Front

What is the value of pi?

Back

3.14

Front

What is the distance around a circle called?

Back

Circumference

Front

What is the formula for the circumference of a circle?

Back

C = 2πr

Front

What is the formula for the area of a circle?

Back

A = πr²

Front

What is the diameter of a circle?

Back

The diameter is twice the radius.

Front

If the radius of a circle is 4, what is the area?

Back

A = 16π

Front

What does the term 'radius' refer to in a circle?

Back

The distance from the center to any point on the circle.