The Circle

Question 1

What is a circle?

Answer 1

Set of all points in a plane that are the same distance from a single point.

Question 2

What is the single point from which all points in a plane are the same distance from called?

Answer 2

The center point

Question 3

What is the radius of a circle?

Answer 3

The distance from the center of the circle to any point of the circle. Every radius of a circle has the same length.

Question 4

What is the Diameter of a circle?

Answer 4

The length of any line segment that connects two points on the circle and passes through center. Every diameter of a circle has the same length.

Question 5

What is the equation for the diameter of a circle?

Answer 5

D=2r

Question 6

What is the equation for the radius?

Answer 6

r=1/2d

Question 7

The distance around a circle is called?

Answer 7

Circumference

Question 8

The ratio of ______ to _____ is the same in every circle

Answer 8

Circumference

Diameter

Question 9

The equations for the circumference of a circle are?

Answer 9

C=3.14d

C=(2)(3.14)r

Question 10

To find the area of a circle the equation is?

Answer 10

A=(3.14)(r^2)