So this cone’s radius is actually \(5\) feet and now finding the volume is pretty straightforward. Note: Want to find the lateral and surface areas of a cone Dont have the slant height No problem This tutorial will show you how to use the Pythagorean. Say we have a cone whose base radius measures \(3\) units, height measures \(4\) units, and slant height measures \(5\) units. So, to solve the volume and surface area equations, we’d simply plug a cone’s measurements into the respective variables. The total surface area of a cone equals the area of the base plus the area of the curved surface. Think of this as a straight line that runs from the tip of the cone to the edge of its base. More specifically, it’s the length of an imaginary line that runs from the center of the circular base to the very tip of the cone.įinally, the \(l\) represents the slant height. The \(h\) represents the height of the cone. The \(r\) represents the radius of the circular base of the cone. But which measurements do these letters (or, as we call them in the ‘math world,’ variables) represent? Where \(r\), \(h\), and \(l\) represent different measurements on the cone.
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