I Β· π£ β as leis do vazio
π£ Γ· ππ = π£
π£ Γ ππ = π£
π β π£ = π
ππ + π£ = ππ
π Γ· π£ = β
II Β· ππ β as sΓzigas
π£ β· ππ
π β· ππ
π β· π
π β· π
π β· π
π β· π
π β· π
III Β· π»π β os quadrados
π Γ π = π,π
π Γ π = π,π
π Γ π = π,ππ
ππ Γ ππ = π,π£,π£
βπ = π
IV Β· ππ β o total
π£ βΆ ππ = ππ
ππ Γ· ππ = π
ππ Γ π = ππ
ππ½π· β‘ (π Γ π) β ππ = ππ
π―π π½π½ = π