Geometry & Measurement
Pythagorean Theorem
Solve for a missing side of a right triangle.
a² + b² = c²
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Geometry & Measurement
Measure triangles, circles, polygons, and solids with their standard geometric formulas.
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Geometry & Measurement
Area Calculators
Areas of common plane shapes.
A = length × width, πr², or bh / 2
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Geometry & Measurement
Surface Area Calculators
Surface areas of common solids.
SA = sum of every exterior face area
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Geometry & Measurement
Circumference Calculator
Circumference from radius or diameter.
C = 2πr = πd
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Geometry & Measurement
Law of Sines / Cosines
Solve standard triangle cases.
c² = a² + b² − 2ab cos C
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Geometry & Measurement
Lateral Area Calculator
Lateral areas of common solids.
LA = perimeter × height (or slant height)
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Geometry & Measurement
Apothem Finder
Find a regular polygon apothem.
a = s / (2 tan(π/n))
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Geometry & Measurement
Frustums Calculator
Conical and pyramidal frustum measurements.
V = πh(R² + Rr + r²) / 3
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Geometry & Measurement
All About Conics
Properties of standard-form conic sections.
Circle, ellipse, parabola, and hyperbola standard forms
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