Yes.
It is an edge.
Any shape you like.
A cube is a 3d square. A sphere is a 3d circle. A prism is a 3d rectangle.
No, it is not.
Surface area is all the areas for a 3 figure. Area is for only on side of a 3d figure
Sometimes because a sphere which is a 3d figure has a diameter
Since a face of a 3d figure is the same as a side, you have two faces sharing a face! The result is lots of coincident faces!
If its 2d its called a semi-circle, if its 3d its called a semi-sphere.
The cone IS a 3d figure.
3d horizontal side by side
it needs to have 3d depth and you can not get that when the eyes are on the side of your head. they need this because they a predators
A 3D figure can be drawn on a flat plane (piece of paper) by using perspective.A horizon (horizontal) line is drawn across the page and a spot marked along the horizon. All side lines of the 3D shape must meet at the spot.Perspective is much used by artists and architects, etc.