CIRCLES

Radius

100

r= 6 cm

c=?

c= 37.7  cm

200

r=9cm

c=?

c=56.52

300

r= 23

c=?

c= 144.44

400

r= 48.3

c=?

c= 303.324

500

r=31

c=?

c=194.7

Diameter

100

d=3

c=?

c=9.42

200

d=8

c=?

c=25.12

300

d=9

c=?

c=28.3

400

d=15

c=?

c=47.1

500

d=23

c=?

c=78.2

definitions

100

 a round-shaped figure that has no corners or edges

Circle

200

the length of the line through the center that touches two points on the edge of the circle.

diameter

300

the region occupied by the circle in a two-dimensional plane. It can be determined easily using a formula,

 A = πr2,

Area

400

the distance from the center of the circle to any point on it's circumference

radius

500

if a circle is opened to form a straight line, then the length of that line will be the circle's___________

circumference 

word problems

100

if a circle has a diameter of 6 and a radius of 3 what is the circumference 

c=18.84

200

stan draws a circle with a diameter of 6 and fred draws one with a radius of 4 whose circle is bigger

Fred's circle is bigger

300

Jane wears a  size 10 hat what is its radius

1.6

400

what is the radius of a circle with a circumference of 113.04

r=18cm

500

Jim's hula hoop has a radius of 6 and Emma's has a diameter of 11 whose is bigger

Jim's hula hoop is bigger