cylinder
A plane figure has 2 dimensions (length & width$ & is represented by a flat surface. It takes 3 noncollinear points to make a plane. A solid figure has 3 dimensions. It not only has length & width but also depth. It takes 4 noncoplaner points to make space
Euclid was a man - a great geometer of the ancient world. Your question should read "What is Euclidean geometry ?" The answer is : Euclidean geometry is that geometry that is based on all Euclid's axioms and postulates, including the one that says "Given a straight line on the plane and a point on the plane that is not on the line, then there can be drawn through the point and on the plane, exactly one line that never intersects the first line." Euclid knew quite well that this last was only a postulate, and that it might be possible to construct a self consistent geometry with this postulate different. It was not until the 19th century that other mathematicians caught on to this, and came up with alternative geometries. When we talk about geometries on a surface then the crucial question is whether the surface is flat - if it is then geometry is Euclidean. If the surface is curved then it isn't. Of course, we amost always do our geometry on a flat surface if we can. We can't if we are trying to navigate on the surface of the earth which is curved. The question becomes really important when we go to three dimensions; what is the geometry of space, is it curved and if so which way. The new geometries were another one of the mathematicians' pretty toys until Einstein showed us that space was in fact curved.
it would be the figure's volume
surface area
Circle
The surface area of a space figure is the total area of all the faces of the figure
The "downward" on the "curved surface" is a 3D model to explain and visualize the effect.
rectangle
A space figure is a figure or shape in 3-dimensional space. It could be solid but it need not be: for example, it could be a wriggly line drawn on the surface of a sphere.
cylinder
It is a cylinder.
Cylinder
1. Plane Figures- A flat, closed figure that is in a plane- A plane figure can be made of straight lines, curved lines, or both straight and curved lines.2. Solid Figures- The figures which occupy space are called solids.- Solids are three dimensional figures i.e., they have length, breadth & height.- There are two important facts related to solids-a. Every solid has a surface area. Some solids have plane surfaces, others have curved surfaces.b. Every solid has a 'bulk' & its bulk occupies some space.3. Surface area-It is the sum of areas of all visible (exposed) surfaces of a solid.4. Volume-It is the three dimensional space occupied by a solid, liquid or gas.5. Lateral surface area - is the sum of the surface areas of all its faces excluding the base.6. Total surface area - is the sum of the surface areas of all its faces including the base.
Its area.
cone
A spitial figure with a circular bases no edges and one vertex