Answer to Question #279931 in Geometry for ggggg

Question #279931

Find the height of a trapezoid with area of 99m2

 and the bottom base is twice the top base, 

which measures 6m.

1
Expert's answer
2021-12-16T09:58:07-0500

Calculation


  • You can use the equation for the are of a trapezoid which is A=12(l1+l2)h\small A = \frac{1}{2}(l_1+l_2)h . Here l\small l represents the length of any base.
  • If the bottom base is 6m\small 6\,m then the top base is 3m\small 3\,m .
  • Upon substitution the values,

99m2=12(6m+3m)h99×2=2×12×(9)×h99×2×19=19×9hh=2\qquad\qquad \begin{aligned} \small 99\,m^2&=\small \frac{1}{2}(6\,m+3\,m)h\\ \small 99\times2&=\small \cancel{2}\times\frac{1}{\cancel{2}}\times(9)\times h\\ \small 99\times2\times\frac{1}{9}&=\small\frac{1}{\cancel{9}}\times \cancel{9}h\\ \small h &=\small 2 \end{aligned}



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