Circumference - Circle - 4

What is the blue colored part of this circle called?

• Circumference

• Diameter

• Radius

• Area

The Circumference of this circle is 56.5 inches. The Diameter is 18 inches. What would you get if you divide its Circumference with Diameter?

• 3.14

• 3

• π

• 7.28

If you use a rope to make a circle, the length of the rope will be the ....

• Circumference

• Radius

• Diameter

If you draw line through the center of the circle, to its edges, that can be called its ...

• Radius

• Diameter

• Circumference

The red arrows in this picture shows the...

• Circumference

• Radius

• Diameter

 $\frac{Circumference}{Diameter}\ =\ π\ \left(3.14\right)\$  

• True

• False

 $Circumference\ =\ 2\ π\ r$  

• Yes, two times Radius multiplied by π

• No, two times Diameter multiplied by π

If the radius of this Circle is 5 Centimeters, what is the measurement of the blue part (Circumference)?

• C = 2πr, Circumference = 2 * 3.14 * 5

• C = π D, Circumference = 3.14 * 10

• C = 2r, Circumference = 2 * 5

• C = 2π, Circumference = 2 * 3.14

If the radius of this Circle is 5 Centimeters, what is the measurement of the blue part (Circumference)?

C = 2πr

• 2 * 3.14 * 5

• 3.14 * 10

• 2 * 5

• 2 * 3.14

If the radius of this Circle is 5 Centimeters, what is the length of the blue part (Circumference)?

C = 2πr

• 31.42 Centimeter

• 30 Centimeter

• 10 Centimeter

• 62.83 Centimeter