SOLUTION: a rectangular piece of wood 100 cm by 90 cm,is to be cut into a trapezoid. find the area,.. where the equivalent of width are both 90cm.and the 1st base is 100.and the 2nd base

Algebra ->  Customizable Word Problem Solvers  -> Geometry -> SOLUTION: a rectangular piece of wood 100 cm by 90 cm,is to be cut into a trapezoid. find the area,.. where the equivalent of width are both 90cm.and the 1st base is 100.and the 2nd base      Log On

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Question 762961: a rectangular piece of wood 100 cm by 90 cm,is to be cut into a trapezoid.
find the area,..
where the equivalent of width are both 90cm.and the 1st base is 100.and the 2nd base is both 15..
.
please, help me...to find the equivalent of the are of a trapezoid..please?

Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
You know one dimension measures 90 cm., and your other equivalent dimension, using the new bases, will be the MIDDLE of the 100 and the 15.

Area is to be %28%2815%2B100%29%2F2%2990 cm^2