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Geometry Calculators
Geometry Calculators
Triangles and plane shapes with visuals and formula steps.
Triangles
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Triangle Calculator
Solve sides, angles, area, and radii.
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Pythagorean Theorem
Solve any side; right-triangle checks.
Plane Shapes (2D)
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Area Calculator
Areas for rectangles, circles, triangles, more.
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Circle Calculator
Radius, diameter, area, circumference with steps.
Solids (3D)
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Volume Calculator
Volume & surface area for box, cylinder, cone, sphere, pyramid.
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Concrete Volume Calculator
Yardage, m³ and bag counts for slabs, footings, tubes.