## What is the radius of 40 mm diameter?

If your diameter is 40m, then your radius must be 20m, as the radius of a circle is always half of the diameter. With this equation, you need to multiply π by 202 . Since 202=400 , your equation will be π⋅400 , or π400 .

### What is the diameter of a 40 circle?

1 Answer. The diameter is 12.74.

**What is the circumference of a 40cm diameter circle?**

Circles (basic)

Diameter | Circumference(approx) | Circumference |
---|---|---|

20 cm | 60 cm | 62.8cm |

40 cm | 120 cm | 125.6cm |

3m | 9m | 9.42m |

5 cm | 15.7 cm | 15.7cm |

**How do I calculate the diameter of a circle?**

How to Calculate Diameter?

- Diameter = Circumference ÷ π (when the circumference is given)
- Diameter = 2 × Radius (when the radius is given)
- Diameter = 2√[Area/π] (when the area is given)

## How many inches is 40mm diameter?

1.5784 ″

Millimeters to inches conversion table

Millimeters (mm) | Inches (“) (decimal) | Inches (“) (fraction) |
---|---|---|

40 mm | 1.5784 ″ | 1 37/64 ″ |

50 mm | 1.9685 ″ | 1 31/32 ″ |

60 mm | 2.3622 ″ | 2 23/64 ″ |

70 mm | 2.7559 ″ | 2 3/4 ″ |

### What is the circumference of 40?

What is the circumference? Write your answer using pi. I know the answer is 125.6, but I don’t have an idea of how to write it using pi.

**What is the circumference of a 40 inch diameter?**

**How do you measure a circle in MM?**

If you know the radius of the circle, double it to get the diameter. The radius is the distance from the center of the circle to its edge. 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.

## Is 40mm the same as 1 inch?

The fraction inches are rounded to 1/64 resolution….Millimeters to inches conversion table.

Millimeters (mm) | Inches (“) (decimal) | Inches (“) (fraction) |
---|---|---|

40 mm | 1.5784 ″ | 1 37/64 ″ |

50 mm | 1.9685 ″ | 1 31/32 ″ |

60 mm | 2.3622 ″ | 2 23/64 ″ |

70 mm | 2.7559 ″ | 2 3/4 ″ |

### How do you calculate diameter from circumference in MM?

Divide the circumference by π, or 3.14 for an estimation. And that’s it; you have the circle’s diameter.

**How do you convert diameter to centimeters?**

Measure the diameter in centimeters. For this example, let the diameter measure 10 cm. Multiply the diameter’s length to itself to square it — 10 cm multiplied by 10 cm results in 100 cm^2. Multiply the squared diameter by pi — 100 cm^2 multiplied by pi equals approximately 314.2 cm^2.

**What is diameter to radius?**

Radius and diameter are close friends – a circle’s radius is half the length of its diameter (or: a circle’s diameter is twice the length of its radius).

## Is diameter a length or width?

Diameter is the length of a line touching two points on a circle that passes through the center. Diameter exists only for circular, or for circle-based objects like a sphere or cylinder, thus the width and length should always be the same.

### How wide is 40in?

Why you must check TV Dimensions before buying it?

Dimensions | ||
---|---|---|

Width | Height | |

Without Stand | 35.13 inch | 20.19 inch |

With Stand | 34.65 inch | 21.85 inch |

Without Stand | 34.84 inch | 20.08 inch |