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Question

Given ¯¯¯¯¯¯¯¯AB of length 7.3 cm and ¯¯¯¯¯¯¯¯¯CD of length 3.4 cm, construct a line segment ¯¯¯¯¯¯¯¯¯XY such that the length of ¯¯¯¯¯¯¯¯¯XY is equal to the difference between the lengths of ¯¯¯¯¯¯¯¯AB and ¯¯¯¯¯¯¯¯¯CD. Verify by measurement

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Solution

Steps of construction:
(i) Draw a line 'l' and take a point X on it.
(ii) Construct ¯¯¯¯¯¯¯¯¯XZ such that length ¯¯¯¯¯¯¯¯¯XZ = length of ¯¯¯¯¯¯¯¯AB = 7.3 cm
(iii) Then cut off ¯¯¯¯¯¯¯¯ZY = length of ¯¯¯¯¯¯¯¯¯CD = 3.4 cm
(iv) Thus the length of ¯¯¯¯¯¯¯¯¯XY = length of ¯¯¯¯¯¯¯¯AB – length of ¯¯¯¯¯¯¯¯¯CD

Verification:

Hence, by measurement we find that length of ¯¯¯¯¯¯¯¯¯XY = 3.9 cm
= 7.3 cm – 3.4 cm
= ¯¯¯¯¯¯¯¯AB - ¯¯¯¯¯¯¯¯¯CD


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