Circles: Area and Circumference

Circle Terms

100

The distance from the center of a circle to the outside, also half of the diameter

What is the radius?

200

The portion of the edge of a circle that is less than 180^o

What is a minor arc?

300

A segment with both endpoints on the circle.

What is a chord?

400

The total amount of space inside of a circle

What is the area?

500

The angle with a vertex at the center and 2 radii as sides

What is a central angle?

Finding Radius(find the radius for all)

100

A circle has a circumference of 21.99

What is 3.5?

200

The area of a circle is 380.13

What is 11?

300

The area of this circle is 615.75

What is 14?

400

The area of this circle is 201.06

What is 8?

500

The circumference of this circle is 131.95

What is 21?

Finding Circumference(Find Circumference for all)

100

The diameter for this circle is 10

What is 31.4?

200

The diameter for this circle is 13

What is 40.82?

300

The radius of this circle is 2.8

What is 17.59?

400

The radius for this circle is 45

What is 282.6?

500

The Diameter for this circle is 3285

What is 10314.9?

Finding Area(Find area for all)

100

The radius of this circle is 2

What is 12.56?

200

The radius of this circle is 3

What is 28.26?

300

The diameter of this circle is 18

What is 254.47?

400

The radius of this circle is 52.4

What is 8621.6864?

500

The diameter of this circle is 10.2

What is 81.71?

Equation of a Circle

100

The equation of a circle

What is (x-h)² + (y-k)² = r²

200

The center coordinate of a circle with the equation (x + 5)² + (y - 6)² = 49

What is (-5, 6)?

300

The radius of a circle with the equation (x -4)² + (y - 10)² =121

What is 11?

400

The center coordinate of a circle with the equation x² + (y + 4)² =71

What is (0, -4)?

500

The radius of a circle with the equation (x - 3)² + (y + 9)² =42.25

What is 6.5?