Before measuring something, it is important to know which unit to use. Estimating its approximate size by comparing it with a more familiar object can help. In order to find a suitable unit of measure ...

Metric units are universally followed in most countries. The metric system was first introduced in France in 1799 and since then has been further refined and has become an international decimalised ...

When comparing or combining an area or volume it is important to measure the objects using the same units. Without converting the areas into the same unit, it might be difficult to tell, for example, ...