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Fantom [35]
3 years ago
9

Hey there! Can you help me please ? Thanks!

Mathematics
2 answers:
svetoff [14.1K]3 years ago
6 0
9(a)
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

9(b)
Area = (4*6)/2 = 12 

Second picture
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

Vinil7 [7]3 years ago
5 0
A. (140x110)+[(50x70)/2] = 15,400+1750= 17,150cm^2

b. (4x6)/2= 12cm^2
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