Question

A scale is necessary for a
a) map
b) sketch
c) symbols

Answer 1

For map only all other are used in scale

Answer 2

A scale is necessary for a map.

In the map, the scale is used to show the distance on the map that is in the correspondence of its actual distance on earth.

There is a variation in the actual distance between two states and the distance between those states.

The distance ratio is extracted from the nominal scale.