The area of ABCD IS 48. If BA = AE and CD = AB find the area of trapezoid BCDE.
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As we know that area of parallelogram ABCD is 48 units.
And the area of parallelogram ABCD can be calculated as:
[tex]\begin{gathered} A_{ABCD}=(BA)\times h \\ 48=BA\times h \\ h=\frac{48}{BA} \end{gathered}[/tex]Now given that BA=AE
So
[tex]\begin{gathered} BE=BA+AE \\ BE=2BA \end{gathered}[/tex]Now area of trapezoid BCDE is:
[tex]\begin{gathered} A_{BCDE}=\frac{1}{2}\times(CD+BE)\times h \\ A_{BCDE}=\frac{1}{2}\times(BA+BE)\times h \\ A_{BCDE}=\frac{1}{2}\times(BA+2BA)\times h \\ A_{BCDE}=\frac{1}{2}\times3BA\times\frac{48}{BA} \\ A_{BCDE}=\frac{1}{2}\times3\times48 \\ A_{BCDE}=72 \end{gathered}[/tex]So area of BCDE is 72 unit.