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December 19, 2014

December 19, 2014

Posted by **leon** on Tuesday, December 6, 2011 at 5:30am.

- Maths -
**drwls**, Tuesday, December 6, 2011 at 7:15amThe area is (1/2)*5*12 = 30 cm^2

You get that from the two perpendicular legs, which form a base and height.

Since AD is the height h' from base b' = BC,

(1/2)*h'*13 = 30

h' = 60/13 = 4.615 = length of AD

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