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Bab Bangun Datar

Luas ECD = 1/2 × CD × tinggi
36 cm^2 = 1/2 × 6 cm × t
t = 36 cm^2 / 3 cm
t = 12 cm

Luas ADE
= 1/2 × AD × tinggi
= 1/2 × (4 cm + 6 cm + 8 cm) × 12 cm
= 6 cm × 18 cm
= 108 cm^2