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it has one more, because a cylinder has 2 and a cone has one.
A cylinder and a cone have infinitely many planes of symmetry because of the circular face. However, a cylinder can also be cut in half lengthwise (imaging cutting a soda can in half), while a cone cannot (imagine cutting a ice cream cone in half). Therefore, a cylinder has one more plane of symmetry than a cone.
It isn't. If the cylinder and the cone have the same height and radius, the cylinder has a larger volume (twice as large). If they do not have the same height and radius you need more information to prove their relative volumes.
The volume of a cylinder is three times as much.
CONE
A lava lamp is shaped like a cone to allow the wax to rise and fall within the lamp in a visually appealing way. The cone shape helps create a more dynamic and mesmerizing lava flow effect as the wax warms up and cools down.
A cone-shaped graduate used for measuring volumes of liquids is not equally spaced because the volume increases exponentially as you move down the cone. The markings are calibrated to account for this non-linear relationship and provide accurate volume measurements.
Traffic cones are orange because it makes them stick out more, making them easier to notice.
Cone shaped deposits that rise from the floor of a cave are called Stalagmites. This is easy to remember as it contains a letter 'G' as does ground. While a Stalactite, which hangs down from a cave ceiling, contains a letter 'C.'
Because 2Pi x r x L is the curved surface of a cylinder. Clearly a cylinder have more surface area than a cone of same height and radius. The surface of the cone is Pi x r x S where S is the slope length, so the cylinder has approximately double the surface area (note S is longer than L).
If these forms are all solid, a sphere has one side and face, a cone two, and a cylinder three. If there are hollow, they have one more face than side.
Its not clear from the question what formulas are being requested, but: Surface area of a right cone (one where a line from the tip through the center of the base is perpendicular to the base) A = πr2 + π r(r2 + h2)½ Volume of a right cone V = (1/3)πr2h Surface area of a cylinder A = 2πr2 + 2πrh Volume of a cylinder V = πr2h where π is the number pi r is the radius of the figure h is the height of the figure perpendicular to the base. The equations for a slanted cone are more complex - so ask again with that specification if that is what you are looking for.