Question

Having the same radious of circle of sphere ,what is the value of total plan angle & solid angle​

Answer 1

Answer:

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.