If the circumference of a circle is 12 cm the radius is: 1.91 cm
Bottle caps are about 2 cm in diameter.
really!? Its 6 cm!
12*pi
First, think about what a diameter of a circle is. It is a line drawn through the middle of a circle from one side to the other. Is a pipe shaped like a circle? Yes, so you can use diameters of a circle to figure this out. Second, draw a circle like the inside of the pipe. Draw a straight line through the middle from one side to the other. Write 10 cm above it. Third draw a circle around the first circle. Draw a line to one end if the first line. Write 1 cm above it. Fourth, do the same on the other end of the first inside line and write 1 cm above it. You should have a line that goes through the middle and all the way to the outside circle. Now, look at what you have: 1 cm on the outside + 10 cm on the inside + 1 cm again on the other outside. If this seems tricky run your finger along the line to see how it works. What do you have? 1 cm + 10 cm + 1 cm = 12 cm. 12 cm is the answer.
The circumference of a 12 cm circle is: 37.7 cm
The circumference of a circle with a diameter of 12 cm is: about 37.7 cm
If the circumference of a circle is 12 cm the radius is: 1.91 cm
If the diameter is 12 cm the radius is 6 cm.
Bottle caps are about 2 cm in diameter.
Radius of a circle is half of its diameter and so 12/2 = 6 cm
It looks just like any other circle, except a different size. If you can find a 3.6 cm circle, it's the same size as that.
really!? Its 6 cm!
113.1 square cm
12*pi
First, think about what a diameter of a circle is. It is a line drawn through the middle of a circle from one side to the other. Is a pipe shaped like a circle? Yes, so you can use diameters of a circle to figure this out. Second, draw a circle like the inside of the pipe. Draw a straight line through the middle from one side to the other. Write 10 cm above it. Third draw a circle around the first circle. Draw a line to one end if the first line. Write 1 cm above it. Fourth, do the same on the other end of the first inside line and write 1 cm above it. You should have a line that goes through the middle and all the way to the outside circle. Now, look at what you have: 1 cm on the outside + 10 cm on the inside + 1 cm again on the other outside. If this seems tricky run your finger along the line to see how it works. What do you have? 1 cm + 10 cm + 1 cm = 12 cm. 12 cm is the answer.
12 cm.