Q: What is the diameter of a no 2 pencil?

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The number of the pencil is based on the type of carbon lead used inside. The thicker the carbon lead gets the higher the number of the pencil becomes. If you notice a mechanical pencil is 0.9mm in diameter so it would be called a #0.9 pencil. A #2 pencil's lead is 2mm in diameter. So Why would we call a pencil a #3 pencil? Because it's lead is 3mm in diameter.

Typical Typically-sized pencil under a ruler. A standard, hexagonal, "#2 pencil" is cut to a hexagonal height of 1⁄4-inch (6 mm), but the outer diameter is slightly larger (about 9⁄32-inch (7 mm)).[

An ordinary pencil is one example.

Millimeters.

Actually, what you are asking is referring to the hardness of the pencil. So both, 0.5mm and 0.7mm are the same hardness as number two pencils. The number of lead, 0.5, is a thinner lead in diameter to the 0.7.

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The number of the pencil is based on the type of carbon lead used inside. The thicker the carbon lead gets the higher the number of the pencil becomes. If you notice a mechanical pencil is 0.9mm in diameter so it would be called a #0.9 pencil. A #2 pencil's lead is 2mm in diameter. So Why would we call a pencil a #3 pencil? Because it's lead is 3mm in diameter.

5mm

scale factor=7/3.5=2

Typical Typically-sized pencil under a ruler. A standard, hexagonal, "#2 pencil" is cut to a hexagonal height of 1⁄4-inch (6 mm), but the outer diameter is slightly larger (about 9⁄32-inch (7 mm)).[

It is twice its radius

An ordinary pencil is one example.

pencils can have differend diameters,regular its about 5mm

Micrometer

Millimeters.

A pencil with one pinted end and one flat end, will have two sides (as the pointed end is all one surface), PLUS however many sides the body of the pencil has - in this case six, so the total willl be 8.

Usually on most pencils it says it on the case or on the side of the pencil by the eraser it says PENCIL #2 or #2.Hope i helped!:)

Actually, what you are asking is referring to the hardness of the pencil. So both, 0.5mm and 0.7mm are the same hardness as number two pencils. The number of lead, 0.5, is a thinner lead in diameter to the 0.7.