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= panjang x lebar
= 57cm x 28cm
= 1596 cm²
Luas bangun II
= alas x tinggi : 2
= (57 - 20 - 19)cm x (51 - 28)cm : 2
= 18cm x 23 cm : 2
= 207 cm²
Luas total :
= 1596cm² + 207cm²
= 1803 cm²