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Directions: Complete the table, and then put your solutions to every number.

Circle 1:
Radius: 4 inches
Diameter: 1.)____
Circumference: 2.)____

Circle 2:
Radius: 3.)_____
Diameter: 12 meters
Circumference: 4.)_____

Circle 3:
Radius: 5 inches
Diameter: 5.)_____
Circumference: 31.4 inches



Answer :

anbu40

Answer:

1) r = 4 in; diameter = 8 in & circumference = 25.13 in

2) r = 6 m; diameter = 12 m & circumference = 37.70 in

3) r = 5 in; diameter = 10 in & circumference = 31.4 in

Step-by-step explanation:

Circumference of circle:

Circumference of the circle is the perimeter of the circle.

Diameter of the circle is a line segment that passes through the center of the circle and whose endpoints lie on the circle. Radius is half the diameter.

1) Radius = r = 4 in

  Diameter = 2*r

                   = 2*4

                  = 8 in

Circumference = 2πr

                         = 2 * 3.1415 * 4

                         = 25.132

                          = 25.13 inches

2)    Diameter = 12 m

                    r = diameter ÷ 2

                      = 12 ÷ 2

                   r = 6 m

Circumference = 2πr

                         = 2 * 3.1415 * 6

                         = 37.698

                          = 37.70 inches

3) r = 5 inches

diameter = 2 *r

                = 2 *5

                 = 10 in

Circumference = 31.4 in

Orelark
To find the circumference of a circle you must use the formula:

Circumference (C) = pi x diameter

pi (or the symbol with two legs and a squiggle on top. My computer doesn’t have this symbol) is generally given as 3.14; it goes on forever so most classes have you use 3.14

The diameter of a circle is twice the length of the radius. With this information known you can now answer your questions.

Circle 1.

Diameter = 2r
Diameter = (2)(4)
Diameter = 8 inches

Circumference = (pi)(8)
Circumference = (3.14)(8)
Circumference = 25.1 inches

Circle 2

Radius = diameter/2
Radius = 12/2
Radius = 6 meters

Circumference = (pi)(diameter)
Circumference = (3.14)(12)
Circumference = 37.7meters

Circle 3

Diameter = (2)(radius)
Diameter = (2)(5)
Diameter = 10 inches

Checking the Circumference answer:

Circumference = (pi)(Diameter)
Circumference = (3.14)(10)
Circumference = 31.4 inches

I hope this helps you. Please let me know if it did. Thank you.



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