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s^2 = 576
s = 24 cm
27. luas trapesium adl = (dc+ab)×de/2
(14+6)×4/2
40 cm^2
luas persegi= 576 cm²
rumus luas = sisi x sisi atau sisi²
maka panjang sisinya = √luas
sisi = √576
sisi = 24 cm