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maka luas Trapesium CFEG = Segitiga ADC - Segitiga AFE - Segitiga DEG.
= 1/2 ABCD - 1/16 ABCD - 1/8 ABCD
= 1/2 × 144 - 1/16 × 144 - 1/8 × 144
= 72 - 9 - 18
= 45 cm²