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panjang AB = √25²-(12-5)² = √625-49 = √576 = 24 cm
L ABQP = 5x24 + 1/2 (12-5) x 24 = 120 + 84 = 204 cm²
L ABQP = L DCQP
jadi Luas ABQCDP = 2 x 204 = 408 cm²