Question
If number of ends in a line is 'X' and the number of ends in a line segment is 'Y', what is the value of 'Y−X'?
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Answer:
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Number of ends in a line = 0 = X
Number of ends in a line segment = 2 = Y
Y−X=2−0=2
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:
Number of ends in a line = 0 = X
Number of ends in a line segment = 2 = Y
Y−X=2−0=2
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