Quadrilateral Inscribed in a Circle

Directions: What is the biggest area of a quadrilateral you can fit in a circle that has a circumference of 20π units?

Hint

Which quadrilateral would have the biggest area that would also fit in a circle?  Because you know the circumference of a circle, what could be the next thing you can find? Explain your process on choosing which quadrilateral you thought would maximize the area, while still fitting in the circle.

Answer

200 square units

Source: Nanette Johnson

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