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2015-06-01T15:23:24+08:00

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Note that:
r - radius
h - height
l - lateral height
b - base
a- base edge

Cone: 
Surface Area : πr (r+l) o r πr (r+√(r²+h²) 
Volume: πr² (h/3)

Cylinder:
Surface Area: 2πr² + 2πrh
Volume: πr²h

Square Pyramid:
Surface area: a² + 2a√(a²/4 + h²)
Volume: a²(h/3) 

Triangle:
Perimeter: a+b+c (a,b, and c are the lengths of the sides)
Area: b*h/2 or √s(s-a)(s-b)(s-c) <= This is the Heron's formula where s is the semiperemeter or half the perimeter.


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