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A cone does not have any parallel lines
A cone.A cone.A cone.A cone.
Suppose the radius of the sphere is R. The base of the cone is the same as the base of the hemisphere so the radius of the base of the cone is also R. The apex of the cone is on the surface of the hemisphere above the centre of the base. That is, it is at the "North pole" position. So the height of the cone is also the radius of the sphere = R. So the ratio is 1.
108.4 square feet
a hexagonal prism has 0 curved surfaces