Question

what is plane angle and solid angle with examples

Answer 1

A solid angle is a 3D angular volume that is defined analogously to the definition of a plane angle in two dimensions. A plane angle, θ, made up of the lines from two points meeting at a vertex, is defined by the arc length of a circle subtended by the lines and by the radius of that circle, as shown below.

Answer 2

Explanation:

A smooth flat surface which extends endless in all directions is called a plane .A plan has infinite lenght and breadth but no thickness