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DC = (√225-144)+15
DC = √81+15
DC = 9+15
DC = 24
jajar genjang
Luas = 8×24
L = 192cm²
Trapesium
Luas = (15+24)×12/2
L = 39×6
L = 234cm²
L TOTAL = 234 + 192 = 426 cm²(B)