A polygon
A geometrical curve is defined as any set of points. Therefore, counter-intuitively, a straight line is also a geometrical curve.
what is the geometrical shape of equipotential surface due to single isolated charge
A polygon
That would either be a quadrilateral (2-Dimensional) or a tetrahedron (3-Dimensional) Note that the meaning of "side" is a bit different depending on whether you are talking 2-D or 3-D.
The Geometrical meaning of the second derivative is the curvature of the function. If the function has zero second derivative it is straight or flat.
point is also known as dot.
"Hedron" is usually at the end of a geometrical shape meaning "faces".
It is called postion and it is represented as a circle with a plus sign in it. For the symbol representations GOOGLE: Geometric Tolerancing Symols.
No, a datum reference is not typically used with roundness tolerancing. Roundness tolerancing relies on the perfect circular form of the part itself, rather than referencing it to other features or datums. The roundness tolerance specifies the allowable deviation from a perfect circle at any section.
The cross product can be said to be a measure of the 'perpendicularity' of the vectors in the product. Please see the link.
The first derivative is the rate of change, and the second derivative is the rate of change of the rate of change.
A point is a geometric element that has position but no extension. It is an exact fixed location having no length, width, or depth.
Geometric Dimensioning and Tolerancing (GD&T)
the different geometrical figures are hexagon nonagon decagon...........
We cannot assess the efficiency of a geometrical shape unless we have a particular purpose in mind. You will have to state what you wish to efficiently do, by means of a geometrical figure.
A patola is a type of sari fabric from Ahmedabad, in which the threads are dyed before being woven to produce geometrical designs in the finished work.