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A circle is 2dimensional while a sphere is 3 dimensional.
Surface area of shapes can be measured in square centimetres
There is no formula for measuring the volume of irregular shapes. The mass can be measured by using a weighing scale.
Is called the capacity or the volume of the container. It is usually measured in cubic centimetres or in litres. There are formulae for straightforward shapes but for most irregular shapes the only way to find the capacity is empirically - fill it with a fluid and then measure the volume of the fluid.
length times(x) width * * * * * Very few 2-dimensional figures are measured by length and width - rectangles (and stretching the terminology) triangles and parallelograms. Certainly not circles, stars, irregular polygons, other irregular shapes.