SI Units,Conversion,Measurement Skills - Chapter XV: Formulae for Area and Volume

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# CHAPTER XV: Formulae for Area and Volume

area of a square	= a²
area of a rectangle	= a × b
area of a triangle	= ½ (a × h)
area of a trapezium	= ½ (a + b) × h
area of a circle	= πr² = ¼ πd²
circumference of a circle	= 2πr = πd
surface area of a sphere	= 4πr²= πd²
volume of a cube	= a³
surface area of a cube	= 6a²
volume of a sphere	= 4/3πr³
volume of a cylinder	= πr²h
surface area of a cylinder	= 2πr (h + r)
volume of a pyramid	= 1/3 a × b × h
volume of a cone	= 1/3 πr² h

volume of a prism	= area of base (trapezium or triangle) × height

Do you like anecdotes, interesting and challenging problems, fun facts, puzzles, jokes related to metric system and measurement? Read them in the 2006 on-line edition of "SI Units, Conversion and Measurement Skills",186 pp.

Wacek Kijewski
Metric Fun
"SI Units, Conversion and Measurement Skills"
PO Box 2358 George 6530 South Africa
tel/fax: +27 44 884 0486

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Wacek Kijewski: born in Poland, studied electronics, telecommunication, acoustics and pedagogy. He taught science in Poland, Hungary and became Lecturer and Principal Tutor in Nigeria and Botswana.
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# CHAPTER XV: Formulae for Area and Volume

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Webmaster: Chidori Designs ( Email )