Frequently Asked Questions
How do I find the slant height of a cone?
The slant height equals the square root of the radius squared plus the height squared, l = sqrt(r^2 + h^2). This follows from the Pythagorean theorem applied to the right triangle formed by the radius, the vertical height, and the slant side.
Does the surface area include the base?
Yes. The total surface area combines the curved lateral surface pi*r*l and the flat circular base pi*r^2. Subtract the base area if you only need the lateral surface, for example when sizing a paper cone or a wrap.
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This calculator provides estimates for informational purposes only. Results are based on assumptions and may not reflect actual outcomes. Consult qualified professionals in relevant fields before making important decisions based on these results.