Measuring Instruments

• Now we use International system of units (SI) is used as standard units all over the world.
• Metre (m) is the SI unit of length.
  • 1m = 100 cm = 1000 mm and  
• In our daily life we use various types of measuring devices such as metre scale, measuring tape, metre rod etc.   
• The use of a measuring instrument depends on the nature of object and the type of surface of object.
• The length of a curved line can be measured with the help of a thread b…