Area Totally Explained

Area is a physical quantity expressing the size of a part of a surface. The term Surface area is the summation of the areas of the exposed sides of an object.

Units

Units for measuring surface area include: ť square metre = SI derived unit

   are = 100 square ť hectare = 10,000 square metres

   square kilometre = 1,000,000 square metres ť square megametre = 10¹² square metres

   square yard = 9 square feet = 0.83612736 square metres ť square

perch = 30.25 square yards = 25.2928526 square metres

acre = 160 square perches or 43,560 square feet = 4046.8564224 square metres ť square mile = 640 acres = 2.5899881103 square kilometres

rectangle that has the length of 12cm and the width of 7cm

Useful formulae

equations for area:>

Shape	Equation	Variables
Square	$s^2,!$	$s$ is the length of the side of the square.
Regular hexagon	$frac Cpi,!$	$C$ is the area of the circle in circular units.

* A disk is the area enclosed in a circle. Often such area is called cross-sectional or circular area like a round cable cut in half!

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