Semicircle Area Calculator
Radius (r)
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Diameter (d)
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Circumference (C)
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Results
Formulas Used
- Area = (πr²)/2
- Perimeter = πr + 2r
- Centroid = (0, 4r/3Ï€)
Where r is the radius of the semicircle
Area
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Perimeter
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Radius
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Diameter
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About Semicircles
A semicircle is half of a circle, formed by cutting a circle along its diameter. It has several interesting properties:
- The area is exactly half of the full circle's area
- The perimeter includes both the curved arc and the diameter
- The centroid (center of mass) is located at (0, 4r/3Ï€) from the diameter
- It has one line of symmetry (the diameter)