9(a)
[tex]Area_{ABCD}=110*140=15400 \ cm^2\\
DO=180-110=70 \ cm \\DF=140-50=90 \ cm \\ Area_{DOF}= \frac{70*90}{2}= 3150 \ cm^2 \\ Area_{ABCO}=15400+3150=18550 \ cm^2[/tex]
9(b)
Area = (4*6)/2 = 12
Second picture
[tex]Area_{ABCE}=8^2=64 \ ft^2 \\ DE= \sqrt{10^2-8^2}= \sqrt{36}=6 \ ft \\
Area_{ADE}=(6*8)/2=24 \ ft^2 \\ Area_{ABCD}=64+24=88 \ ft^2 [/tex]
