Circle Time!

FIND RADIUS

100

True or false: The radius is half of the diameter

True

200

Find the radius when the diameter is 20

10

300

Find the radius when the diameter is 50

25

400

Find the radius when the diameter is 14.22

7.11

500

Find the radius when the diameter is 10.48

5.24

FIND DIAMETER

100

True or false: The diameter is half the size of the radius

If false, state the truth.

False

The diameter is twice the size of the radius

200

Find diameter when the radius is 90

180

300

Find diameter when the radius is 16

32

400

Find diameter when the radius is 34

68

500

Find diameter when the radius is 11.34

22.68

FIND CIRCUMFERENCE (WHEN GIVEN DIAMETER)

100

What is the equation to find circumference when given diameter?

C = pi(d)

200

Find circumference when the diameter is 5

15.7

300

Find circumference when the diameter is 30?

94.2

400

Find circumference when the diameter is 22?

69.08

500

Find circumference when the diameter is 85.5?

268.47

FIND CIRCUMFERENCE (WHEN GIVEN RADIUS)

100

WHAT IS THE EQUATION TO FIND THE DIAMETER WHEN GIVEN THE RADIUS

C = 2r(pi)

200

Find circumference when the radius is 8

50.24

300

Find circumference when the radius is 4

25.12

400

Find circumference when the radius is 11

69.08

500

Find circumference when the radius is 2.35

14.758

VOCABULARY

100

DISTANCE AROUND THE CIRCLE

CIRCUMFERENCE

200

DISTANCE FROM THE CENTER TO THE OUTER EDGE OF THE CIRCLE

RADIUS

300

DISTANCE ACROSS THE CIRCLE THROUGH THE CENTER

DIAMETER

400

THE RATIO OF CIRCUMFERENCE OVER DIAMETER (yummy)

PI

500

THE SPACE INSIDE THE CIRCLE

AREA