2D Geometry Calculators
Solve for area, perimeter, and circumference of two-dimensional plane geometric shapes with full arithmetic breakdowns.
2D Shape Solvers
Circle Area & Perimeter
Circle area:
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A = πr², Circumference: C = 2πr.Triangle Area & Perimeter
Triangle area:
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A = (1/2)bh with Heron's formula support.Rectangle Area & Perimeter
Calculate rectangular boundary and space:
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A = lw.Sphere Volume Formula
See how 2D circles expand into 3D spheres:
Sphere Formula →
V = 4/3 π r³.