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Posted by **Malik** on Tuesday, February 8, 2011 at 11:33am.

- Geometry -
**Reiny**, Tuesday, February 8, 2011 at 11:42amarea of trapezoid

= (sum of two parallel sides) x height / 2

80 = (sum of two parallel sides)(8)/ 2

20 = (sum of two parallel sides)

but the median = (sum of two parallel sides)/2

= 10

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