Q.

State whether the statement is true or false.


Every line segment has a unique midpoint.


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a

False  

b

True

answer is A.

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Detailed Solution

Using the following concepts,
• Every line segment contains a single midpoint.
• A midpoint is a point on a line segment that divides it into two equal halves.
Suppose P   and Q   are the midpoints of line segment A and B.
If P=Q   then, the midpoints of the line segment are unique.
As we know, Q   is a midpoint,
Therefore, Q   divides AB into equal halves,
= AQ=QB    …….(1)
And when P   is a midpoint, P   divides AB into equal halves,
= AP=PB                        ……..(2)
Subtracting (2) from (1),
  APAQ=PBQB PQ=PQ 2PQ=0 PQ=0   This implies that P=Q  , thus P   and Q   coincide.
Therefore, every midpoint of a line segment is unique.
Hence, option 1 is correct, and the given statement is true.
 
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