Construct AB of length 7.8 cm. From cut off AC of length 4.7cm. measure BC
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the value of BC is measured by making the diagram, so you first please make diagram and then measure the value of BC.
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(i) Place the zero mark of the ruler at A.
(ii) Mark a point B at a distance 7.8 cm from A.
(iii) Again, mark a point C at a distance 4.7 from A.
By measuring
, we find that BC = 3.1 cm
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