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B(x₂,y₂,z₂) = (1, 3 - 2)
C(x₃,y₃,z₃) = (1, 4, 6)
koordinat titik berat
Xz = 1/3(x₁+x₂+x₃) = ¹/₃(4+1+1)= 2
Yz = 1/3(y₁+y₂+y₃) = ¹/₃(-1+3+4)= 2
Zz = 1/3(z₁+z₂+z₃) = ¹/₃(2-2+6) = 2
koordinat titik berat Z(Xz, Yz,Zz) = (2,2,2)