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October 20, 2014

October 20, 2014

Posted by **Veronica** on Tuesday, June 7, 2011 at 7:00pm.

- geometry -
**Henry**, Wednesday, June 8, 2011 at 8:11pmFirst, we draw the trapezoid with the long base on the bottom. Using dotted lines, we draw 2 altitudes forming 2

congruent rt. triangles and a rectangle.

AE=ED = (AD-BC) / 2 = (12-10)/2 = 1in =

hor. sides of rt. triangles.

AB = CD = sqrt(1^2+4^2) = sqrt17 =

4.1in. = Length of non-parallel sides.

P = 4.1 + 10 + 4.1 + 12 = 30.2in.

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