There is no special SI prefix for the number 3.
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You divide the number of meters by 1000. The prefix "kilo" means 1000.You divide the number of meters by 1000. The prefix "kilo" means 1000.You divide the number of meters by 1000. The prefix "kilo" means 1000.You divide the number of meters by 1000. The prefix "kilo" means 1000.
"hecto-" is the prefix, as in 100 metres is a hectometre. ■
The tri- refers to three.The prefices come from the European use where the prefices represented the powers of a million. This is known as the long scale.billion = million^2 (bi- = 2)trillion = million^3 (tri- = three)quadrillion = million^4 (quadra- = four)and so on.This meant that a number with a prefix representing the number n had 6n zeros.However, most non-European countries, as well as the UK, use the short scale. In this scale, there is no direct link between the prefix and the power. From a billion onwards, (prefix + 1) is the power of 1000. In this scale, a number with a prefix representing the number m had 3*(m+1) zeros.
For the simple reasons that polygons are named after the number of sides, and the Greek prefix "icosa" means twenty!For the simple reasons that polygons are named after the number of sides, and the Greek prefix "icosa" means twenty!For the simple reasons that polygons are named after the number of sides, and the Greek prefix "icosa" means twenty!For the simple reasons that polygons are named after the number of sides, and the Greek prefix "icosa" means twenty!
The prefix 'poly' - simply means 'many'. It does not refer to a specific number.