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A cone is a three - dimensional geometric figure that tapers smoothly from a flat base (frequently, though not
necessarily, circular) to a point called the apexor vertex.
It has one bace and one lateral face
Cross section parallel to base has the same shape, as bace (circular)
Cross section perpendicular to base is triangle
Еo find the total surface area of the cone , we
must find the area of the side surface (lateral face) and the base.
Formula of cone side surface (Ssf) is Ssf= pi*r*l where cone.JPG
Formula of cone base (Sb) is Sb= pi*r^2
Formula of total surface area(St) is St= Ssf+Sb
Formula of cone volume is Vc= 1/3 *pi*r^2*H where h is height of cone
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