# How are diameters measured?

## How are diameters measured?

The diameter is the measurement across the circle passing through the center. The two formulas involving the diameter are the one that says the diameter is twice the radius and the one that says the circumference is the diameter times pi.

### Is diameter in cm or MM?

Metric Units For example, kilometers would be the preferred measurement units used to report the diameter of the Earth, whereas millimeters or centimeters would be the ideal units in reporting the diameter of a coin.

What are 5 centimeters in diameter?

We use this because it is easy to measure the diameter of a circle. It’s not really tricky. The diameter is ALWAYS approximately 3 times smaller than the circumference!…Circles (basic)

Diameter Circumference(approx) Circumference
40 cm 120 cm 125.6cm
3m 9m 9.42m
5 cm 15.7 cm 15.7cm

How do you go from diameter to CM?

Divide the circumference by π, or 3.14 for an estimation. The result is the circle’s diameter, 3.18 centimeters. Divide the diameter by 2. And there you go, the radius of a circle with a circumference of 10 centimeters is 1.59 centimeters.

## What is the diameter of 1 inch?

CATEGORIES

Diameter Nominal DN (mm) Nominal Pipe Size NPS (inches) Outside diameter (OD) inches (mm)
20 3/4 1.050 in (26.67 mm)
25 1 1.315 in (33.40 mm)
32 1 1/4 1.660 in (42.16 mm)
40 1 1/2 1.900 in (48.26 mm)

### How do you measure a circle in CM?

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.

How big is a 2 inch diameter?

Did you know? 2 inches is equal to 5.08 centimeters or 50.8 millimeters.

What is the radius of 5 centimeters?

r = 0796 is right answer.

## What is the diameter of a 11cm circle?

Answer the radius of the circle measuring 11 cm diameter is 5.5 cm.

### What is the diameter of 7 cm?

Here,diameter is 7 cm. So radius is 7/2=3.5 cm.

What is 10mm to CM?

Millimeters to centimeters conversion table

Millimeters (mm) Centimeters (cm)
8 mm 0.8 cm
9 mm 0.9 cm
10 mm 1 cm
20 mm 2 cm

Are centimeters bigger than millimeters?

The centimeter (cm) is also a unit of length which is ten times larger than a millimeter and is equal to one hundredth of a meter; therefore, there are 100 centimeters in a meter. There are 2.54 centimeters in one inch. It is approximately the width of an adult fingernail, the width of a button, or of the keys in a piano.

## How many centimeters are in a centimeter?

1 centimeter. 1 centimeter =. 1 cm 2. 2 cm 2 =. 1.4142 centimeter. 2 centimeter =. 4 cm 2. 3 cm 2 =. 1.7321 centimeter.

### Is centimeters greater than meters?

There are 100 centimeter in a meter. 1 Meter is equal to 100 Centimeter. 1 m = 100 cm. A meter is a SI unit scientifically accepted as the base unit of distance and length. Along with other units like a kilometer or an inch, a meter is one of the fundamental units in SI.

What are three things measured in centimeters?

The waist size of a pair of trousers

• Length of the fish caught
• The radius of a car’s tires
• The distance between a person’s eyes