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April 19, 2015

April 19, 2015

Posted by **caity** on Wednesday, September 14, 2011 at 9:22pm.

- Geometry -
**Reiny**, Wednesday, September 14, 2011 at 10:40pmI will assume you are saying that the two parallel sides are 20 and 15 units long

let the height be h

(20+15)(h)/2 = 60

35 h = 120

h = 120/35 = 24/7 units

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