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Posted by **acshikari** on Tuesday, September 20, 2011 at 7:16am.

- math -
**drwls**, Tuesday, September 20, 2011 at 8:16am4 m below the apex, the area of a section is (4/10)^2 * (base area)

Assuming the base is an equilateral triangle, the base area is

(4.5/2)*sqrt3 = 3.897 m^2

Thus A = 0.6235 m^2

- math -
**acshikati**, Friday, September 23, 2011 at 12:20amhmmm. what does the base edge means?

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