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A vierkant = z.z = z²
oppervlakte vierkant
p vierkant = 4.z
omtrek vierkant
A rechthoek = l.b
oppervlakte rechthoek
p rechthoek = 2.(l+b)
omtrek rechthoek
A ruit = (D.d):2
oppervlakte ruit
p ruit = 4.z
omtrek ruit
A parallellogram = b.h
oppervlakte parallelogram
p parallellogram = 2.(b+sz)
omtrek parallellogram
A trapezium = ((B+b).h):2
oppervlakte trapezium
p trapezium = z1 + z2 + z3 + z4
omtrek trapezium
A kubus = 6.z.z = 6.z2
omtrek kubus
V kubus = z.z.z = z3
volume kubus
A balk = 2lb + 2bh + 2lh
oppervlakte balk
V balk = l.b.h
volume balk