Centroid Calculator
Calculate the centroid (geometric center) of various 2D shapes.
How to Calculate Centroid
The centroid is the geometric center of a shape. Different shapes have different formulas:
Triangle: (x₁ + x₂ + x₃)/3, (y₁ + y₂ + y₃)/3
Rectangle: (width/2, height/2)
Circle: (0, 0) relative to center
Semicircle: (0, 4r/3π) relative to diameter
Quarter Circle: (4r/3π, 4r/3π) relative to corner
Polygon: (Σxᵢ/n, Σyᵢ/n) for n vertices
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