# What is the diameter of 4.2 cm

## What is the diameter of a circle of 4cm?

If the radius of the circle is 4 cm, then the diameter of the circle is 4 cm x 2, or

**8 cm**. If you know the circumference of the circle, divide it by π to get the diameter.## What is the circumference of each circle 4.2 cm?

Thus, the circumference of the circle is

**26.4 cm**.## How do you convert cm to diameter?

**Divide the circumference by π**. This is the circle’s diameter, in this case, 31.8 centimeters. Divide by 2.

## What is the diameter of 2.4 cm?

1 inch

LNCtips.com: Wound Sizing

CM | Inches | Object |
---|---|---|

0.1 cm | 0.04 inches | Grain of sugar |

2.4 cm | 1 inch |
Quarter |

2.6 cm | 1 inch | Diameter of C battery |

2.7 cm | 1.1 inches | Diameter of light bulb base |

## What is the area of circular ring?

Therefore, the area of a circular ring

**= π(R + r) (R – r)**, where R and r are the radii of the outer circle and the inner circle respectively.## What is the perimeter of protector?

The perimeter of a protractor is. πr.

**πr + 2r**.