1967 | OriginalPaper | Chapter
Measurement of Area
Authors : D. M. Neal, B.Sc., D. J. New, B.Sc. (Eng.), A.C.G.I.
Published in: Working With Arithmetic
Publisher: Macmillan Education UK
Included in: Professional Book Archive
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From a piece of cardboard (or paper) cut two squares, each side 4 in., and weigh them on a physical balance. They weigh the same because they are of the same material and shape.