tolong ya jawab!!!^_^

luas bangun 1 = 10x15 = 150 cm²
luas bangun 2 = 1/2x7,5x10 = 37,5 cm²
luas keseluruhan = luas bangun 1 + 2(luas bangun 2) = 150 + 2(37,5) = 150 + 75 = 225 cm²

bangun 2 = 15 x 10= 150/2= 75
bangun 1 = 15 x 10 = 150
75 + 150 = 225