L layang2 =1/2 x 16 x 16 = 128
L trapsum= 1/2 x (13+10) x 10 = 115
jumlahnya = 128 + 115 = 243 cm²
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L layang2 =1/2 x 16 x 16 = 128
L trapsum= 1/2 x (13+10) x 10 = 115
jumlahnya = 128 + 115 = 243 cm²