Circles

Circle Terms

100

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

What is radius

200

The longest chord in a circle

What is the Diameter

300

A line through the circle.

What is a chord?

400

The total amount of space inside of a circle

What is the area?

500

3.14 or 22/7

What is pi?

Circumference and Area

100

The area of a circle with a radius of 5

What is 78.54

200

The circumference of a circle with a diameter of 10

What is 31.42

300

The length of an arc in a circle with radius of 9 and angle of 42^o.

What is 6.6

400

The area of a sector in a circle with radius of 3 and angle of 197^o.

What is 15.47

500

The area of a sector with radius of 48 and angle of 2^o.

What is 40.21

Angles

100

The formula to find an angle inside the circle.

What is big arc + little arc /2

200

The measure of arc JK if angle JPK is 83^o.

What is 83^o.

300

The angle GAC if arc AF is 72^o arc BD is 25^o, and FD is a diameter.

What is 138.5^o

400

Angle MQP if arc MP is 111^o and arc NO is 84^o.

What is 97.5

500

The measure of angle C if arc BD is 32^o and arc AF is 72^o.

What is 20

Segments

100

The formula for two secant lines.

What is whole * part = whole * part

200

The length of DE if GE is 8.74

What is 8.74

300

The length of BX if DX is 6, AX is 12 and CX is 4.

What is 8

400

The length of BX if CX is 4 and AX is 9

What is 6

500

The length of DX if BX is 2, AX is 10 and CX is 3.

What is 15

Equations of a circle

100

The equation of a circle.

What is (x-h)²+(y-k)²=r².

200

The equation of a circle with a center of (4, -2) and a radius of 7

What is (x-4)²+(y+2)²=49

300

The center and radius for a circle with an equation of (x+2)²+(y+10)²=81

What is (-2,-10) and 9

400

The equation of a circle with a center of (0,-2) and radius of 3.8

What is x²+(y+2)²=14.44

500

The center and radius of a circle with an equation of (x-5)²+y²=47

What is (5,0) and 6.86