Yes if cut in half from its apex to its base diameter.
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.
hemisphere
Cut a sphere in half which is called a Hemisphere and you have 2 sides. The cut side and the sphere side.
Depends on the way you cut the cone, but the outline is either an ellipse or a parabola.
it a cone cut in half from the top
It is called a frustum.
Yes if cut in half from its apex to its base diameter.
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.
To cut something in half is called "halving." This involves dividing an object or quantity into two equal parts.
hemisphere
A truncated cone is basically a cone with it's tip cut off.
There is no frustum of a cone. There is a frustum, which is a cone with the top cut off parallel to the ground.
You simply calculate it like a cone, but the height of the cone is the height to the top of the FILLED part, not all the way. Half-filled is not enough information . . . there can be "half filled" meaning half the height of the cone, but can also be "half filled" meaning half the volume of the cone.
Whats a diagram
It becomes an hemisphere
When a cone is sliced parallel to the base then the shape produced is a circle. If the cone is sliced at an angle so that the cut goes completely through the cone then an ellipse is produced. If the cut is made perpendicular to the cone's base then the shape produced is a parabola.