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In the flat triangular surface depicted above, if feet, what is the area of the surface in square feet? (Figure not necessarily
In the flat triangular surface depicted above, if feet, what is the area of the surface in square feet? (Figure not necessarily
admin
2011-02-20
55
问题
In the flat triangular surface depicted above, if
feet, what is the area of the surface in square feet? (Figure not necessarily drawn to scale.)
选项
A、
B、
C、
D、
E、
答案
E
解析
Since the leg of the right triangle is
and the hypotenuse is x, we can tell that it is a 30-60-90 triangle and that the other leg is x12. The area of a triangle is 1/2 base times height, so the area is
and since we know that
feet and therefore x2=6 square feet, the area is
.
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