Different styles of scales are:

Plain SCALE: In which, one can measure certain units and its one tenth value. For example a scale in cm and mm is a plain scale, m and dm is another plain scale.

Diagonal scale: In which, one can measure certain units, its one tenth value as well as its one hundredth value. For example a scale in m, dm and cm is a diagonal scale, dm, and cm and mm is another diagonal scale.

COMPARATIVE or Corresponding scale: These are two different scales having same R.F. but different units. These can be PLACED side by side or placed over one and another.

For example: in miles and kilometres.

These scales can be plain scales or diagonal scales.

VERNIER scales: It is a scale which is extremely accurate for measurement. It uses a Vernier calliper. Vernier calliper is an INSTRUMENT to measure a dimension very precisely. Normally its least count is 1/100 of the scale unit. Say a scale is in cm, then a Vernier can measure very accurately up to 1/100 of a cm i.e. 2.12 cm.

Different styles of scales are:

Plain scale: In which, one can measure certain units and its one tenth value. For example a scale in cm and mm is a plain scale, m and dm is another plain scale.

Diagonal scale: In which, one can measure certain units, its one tenth value as well as its one hundredth value. For example a scale in m, dm and cm is a diagonal scale, dm, and cm and mm is another diagonal scale.

Comparative or Corresponding scale: These are two different scales having same R.F. but different units. These can be placed side by side or placed over one and another.

For example: in miles and kilometres.

These scales can be plain scales or diagonal scales.

Vernier scales: It is a scale which is extremely accurate for measurement. It uses a Vernier calliper. Vernier calliper is an instrument to measure a dimension very precisely. Normally its least count is 1/100 of the scale unit. Say a scale is in cm, then a Vernier can measure very accurately up to 1/100 of a cm i.e. 2.12 cm.