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February 6, 2016
Posted by **mike** on Wednesday, October 27, 2010 at 12:58am.

- geometry -
**jai**, Wednesday, October 27, 2010 at 3:23amfirst of all, i don't know if there is a figure given in your question,, but if there is not, you have to imagine,,

it is composed of a trapezoid EBCD and triangle AED,, therefore,

Area,trapezoid = (b1+b2)*h/2

Area,triangle = bh/2

A,trap = (13+15)*18/2 = 252 sq yards

A,tri = (20*15)/2 = 150 sq yards

**note that 20 came from 38-18

therefore,

A,quad = 252+150 = 402 sq yards

so there,, :)