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jawabannya adalah 25cm
jawaban nomer 2
sisi miring
Lp = 2(La ) + (kliling alas x t)
= 2 ( 15x 20:2) + ( (15+20+25)x 30)
= 2 ( 150 ) + ( 60 x 30 )
= 300 + 1200
= 1500 cm²