Right and oblique cones with radius, height and slant height

The Cone Generator draws a cone to scale from its radius, or its diameter, and its height or its slant height, working out the other. The height and radius are drawn dashed with a right-angle square between them, so the right triangle inside the cone is there to see.

Teachers use it for volume and surface area questions and for the Pythagorean theorem: label the slant height x and give the height and radius. Label each measure with its number and unit, with text like r or x, or nothing.

What you can set

• The radius, or the diameter instead, drawn across the base
• The height or the slant height of a right cone, the other worked out
• Right or oblique, leaning left or right, with the height and the lean
• Each measure typed as a number, a fraction or with √, and labeled with its measure, text like x, or nothing
• The back of the base circle dashed or left off, the dashed height, and right-angle squares
• A unit (cm, m, mm, in, ft, yd, units or your own), rounding for worked-out measures, and labels you can drag on the figure

Copying, printing and sharing

Copy the figure straight into a test, worksheet or slide, or download it as a PNG or SVG. Printing the page prints just the figure. Share link copies the page’s address with your settings in it, so anyone who opens it sees this exact figure, and presets save settings you use often in your browser. It’s free, with no sign-up.

Frequently asked questions

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