Circles: Radius, Diameter, and Area

Circle Terms

10

A line through the circle.

What is a chord?

10

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

What is radius

10

The longest chord in a circle

What is the Diameter

10

The total amount of space inside of a circle

What is the area?

10

What is the value of Pi?

3.14

Finding Radius(find the radius for all)

10

The diameter of this circle is 27

13.5

10

The Diameter of this circle is 32 cm

11 cm

10

The diameter is 9 inch 

4.5 inch

10

The diameter of this circle is 90

45

10

The diameter of this circle is 112

56

Finding Diameter (Find Diameter for all)

10

The radius of this circle is 43

86

10

The radius of this is 17 meters

34 meters

10

The radius of this circle is 2.5

What is 5

10

The radius of this circle is 4.5

9

10

The diameter of this circle is 76

38

Finding Area(Find area for all)

10

The radius of this circle is 21

1384.74

10

The radius of this circle is 2

12.56

10

The radius of this circle is 3

28.26

10

The radius of this circle is 12

456.16

10

The radius of this circle is 16 cm

803.84

Solving area of a circle

10

R= 6 cm

D=

A=

R= 6 cm

D= 12 cm

A= 113.04

10

R=

D=16 m

A=

R= 8 m

D= 16 m

A= 200.96

10

R= 10 m²

D=

A= 

R= 10 m²

D= 20 m²

A= 314 m²

10

R= 

D= 28 cm²

A=

R= 14 

D= 28

A= 615.44

10

R= 2 cm²

D=

A=

R= 2 cm²

D= 4 cm²

A=12.56 cm²