# Trapezoid thirds

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

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#### You need to know the following knowledge to solve this word math problem:

**algebra**- expression of a variable from the formula
**planimetrics**- area of a shape
- triangle
- trapezoid
- diagonal
**basic functions**- reason
**numbers**- fractions

#### Units of physical quantities:

#### Grade of the word problem:

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