Trapezoid thirds

The ABCD trapezoid with the parallel sides of the AB and the CD and the E point of the AB side if the segment DE divides the trapezoid into two parts with the same area. Find the length of the AE line segment.

Result

x = (Correct answer is: )

Solution:

$S_{1}=xh/2 \ \\ S_{2}=(a-x)h \ \\ S_{1}=S_{2} \ \\ xh/2=(a-x)h \ \\ x=2a - 2x \ \\ 3x=2a \ \\ x=|AE|=2/3 \ a$

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Dr Math

AE = 2/3 AB

2 years ago  Like

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