We use different kinds of tools when we measure a physical quantity such as the weight of the rice, the distance of the floor to the wall and the volume of the water in the tank. In the ancient times, our forefathers use their body parts such as their arms and hands to measure distance. As science evolved, people have established a standard measuring technique what we call now as the metric system. This system made measuring possible that paved for the inventions of several products. It was adopted to the whole world which helped people in their everyday lives.source https://broadreview.com/best-protractors/
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