pencils can have differend diameters,regular its about 5mm
A mathematical point is only a location, and has no dimensions. Of course, when you mark the point on paper, it has the same diameter as the lead in your pencil, or the ball on your BIC.
pencil
A pencil is usually sharpened to a point.
If you mean the diameter of a circle with area pi, then the diameter is 2. If you mean the diameter of a circle with circumference pi, then the diameter is 2. If you mean the diameter of a circle with diameter pi, then the diameter is pi. If you mean the diameter of a circle with radius pi, then the diameter is 2pi.
The piece of lead in a pencil or the pencil.
5mm
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.
It is twice its radius
An ordinary pencil is one example.
Micrometer
Millimeters.
A pencil's length is quite a bit more than either; a pencil's diameter is several millimeters, but less than a centimeter (unless you're talking about an oversized novelty pencil, or the kind that they make kindergarten students use).
scale factor=7/3.5=2
Lead for a mechanical pencil is typically 0.5 to 0.3 mm.
An average pencil when new would be around 15 centimetres long.
For finding accurate volume of a pencil use a vernier calliper, which measures diameter up to two significant figures. For finding volume of a pencil you will need radius (r) and length (L) of the pencil. V = 3.14 r²L
The Dimensions vary. The average length is about 150mm. The average diameter is about 12mm.