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no 23)
luas persegi = 12^2 = 144
luas trapesium = (8+13) x 12 / 2 = 21 x 6 = 126
luas yg diarsir = (144 + 126 - 158) / 2
= 56 cm^2
jawaban A
no 23 yg ada pd foto kedua
luas peregi = 12^2 = 144
luas trapesium = (6+15) x 12 / 2
= 21 x 6
= 126
luas yg diarsir = 48
luas yg tdk diarsir = (144 + 126) - (2 x 48)
= 174 cm^2
jawaban D