Looking from a bird's-eye view, it makes a sector (a pie slice of a circle). Technically speaking, the cake is 3D and thus an extruded sector, but as the cake is a lie, it doesn't really matter anyways.
a cylinder
Triangle
Jelly is not needed in cheese cake, unless the question refers to gelatin. Plain or lemon gelatin is used in "refrigerator cheese cake," the type of cheese cake that is not baked. The gelatin makes the cake solid and firm enough to slice.
It all depends on the type of cake, the icing, any filling, how big the slice is, and the flavor of the cake.
It varies depending on the store or bakery where you buy it. If you mean homemade cake, it depends on the type and the ingredients.
Type your answer here... solid
The type of matter with a definite volume but no fixed shape is a liquid. In a gas, there is no definite volume or shape, and in a solid there is a fixed shape and definite volume. A liquid is free to adopt of shape of its container, but its volume is fixed.
It depends a lot on factors of the cake, such as icing, layers, fillings, decorations (sprinkles, shaved chocolate, piping, ect.) and they type of cake (milk chocolate, baking chocolate, dark chocolate, ect.). Generally, a small slice of fairly simple and plain chocolate cake will be about 200 calories. A large slice can be about 400 calories. But a more complex cake can be up to 700 or 800 calories a slice.
Round or square / rectangle. It depends on the type.
Solid
Hexagon
a cast fossil
A polyhedron is a solid shape with four or more polygonal faces. A hexahedron is a solid shape with six polygonal faces and so is a particular type of polyhedron.
Matter that has a definite shape and volume is in solid state.