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L₁ = (6 - 2) • 2
L₁ = 8 cm²
L₂ = P • ℓ
L₂ = 8 • 2
L₂ = 16 cm²
L₁ • x₁ + L₂ • x₂
Xo = ______________
L₁ + L₂
8 • (2 + 4/2) + 16 • 2/2
Xo = ____________________
8 + 16
8 • 4 + 16 • 1
Xo = ___________
24
Xo = 2 cm
______________________________________________________
L₁ • y₁ + L₂ • y₂
Yo = ______________
L₁ + L₂
8 • (2/2) + 16 • 8/2
Yo = _________________
8 + 16
8 • 1 + 16 • 4
Yo = ___________
24
Yo = 3 cm
Jadi, koordinat titik berat bidang adalah (2, 3)
Ok?