# WHATS IS THE FURMULA OF AREA

2
by eye

2014-10-08T12:19:14+08:00
Of what area are you actually asking anyway?
Here's some though:
Area of a square:
A = s²
where s is the length of one side
Area of a rectangle:
A = lw
where 'l' is the length and 'w' is the width
Area of a triangle:
A = 1/2 bh
where b is the length of the base and h is the length of the altitude or the height
Area of a regular polygon:

where β=360/n
n is the number of sides, r is the radius of the circumscribing circle,
a is the length of one side of the polygon, h is the altitude or the height
Area of a circle:
A =π r²  or
where r is the radius, d is the diameter