# maximum area

## 01 Maximum area of triangle of given perimeter

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## Length of one side for maximum area of trapezoid (solution by Calculus)

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## Length of one side for maximum area of trapezoid (solution by Geometry)

**Problem**

BC of trapezoid ABCD is tangent at any point on circular arc DE whose center is O. Find the length of BC so that the area of ABCD is maximum.

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