Psquare
4s
Prectangle
2w + 2l
Ptriangle
a + b + c
Ccircle
2?r
Asquare
s�
Arectangle
l(w)
Atriangle
bh/2
Atrapezoid
h(b1 + b2)/2
Acircle
?r�
Vcube
Vrectangle
l(w)h
Vcircle
?(r�)h
Vsphere
4/3?r�
Vcone
?(r�)h/3