A cone is a 3D shape with 2 faces and one edge ... The volume of a cylinder is Ï€ × r² × l (r is the radius of the circle and l is the length of the cylinder). To calculate the volume we ...
Image caption, ...you've done it! The sectors rearranged into the rectangle show the area of the curved surface of the cone = Ï€ × radius × slant length.
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