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Mathematics 17 Online
OpenStudy (anonymous):

Help...

OpenStudy (anonymous):

OpenStudy (anonymous):

anyone???

OpenStudy (anonymous):

Angle BAD = 90 deg. Therefore angle BAE = 45 deg. Therefore AE = 5. EC =\[\sqrt{13^2-5^2} \]\[\text{area}=\frac{2}{2} \left(\sqrt{13^2-5^2}+5\right) 5=85 \]

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