Circumferences and Areas |
Pi = 3.141592653589793238462643383279 |
| Figure | Area | |
| Circle | Diameter = R * 2
Circumference = 2 * R * Pi |
R * R * Pi |
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| Ellipse | Smaller Diameter
= 2 * r
Larger Diameter = 2 * R Circumference = (R + r) * Pi |
R * r * Pi |
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| Ring | Pi(R2 - r2) | |