Quarter Circle Calculator

Calculation of the quarter circle. A quarter of a circle inscribed in a square. The missing part of the square outside the quarter circle is also called a spandrel. Enter one known value. Then click the “Calculate” button.

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Quarter Circle Calculator

Radius (r)
Arc length (l)
Perimeter (P)
The area of the quarter circle (A1)
The area of the missing piece (A2)
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