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panjang AD = akar dari 10^2 - 3^2 = √91 cm
luas segitiga 1 = 6 x 8 / 2= 24 cm2
luas segitiga 2 = √91 x 3 / 2 = 1,5√91 cm2
jumlah luas = 24 + 1,5√91
panjang AC=10 cm
panjang AD=√(10²-3²)=√91
luas segitiga ACD=1/2×√91×3=1,5√91
luas ABCD=24+1,5√ 91 cm²