Area in yen
Calculates the area and circumference of a circle based on its radius.
| Area S | |
| Circumference L |
| \(\normalsize Circle\\ (1)\ diameter:\hspace{45px} R=2r\hspace{30px}r:\ radius\\ (2)\ area:\hspace{80px} S=\pi r^2=\pi({\large\frac{R}{2}})^2\\ (3)\ circumference:\ L=2\pi r=\pi R\\\) |
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