Q.

State whether the statement is true or false.
The line segments of a quadrilateral joining the mid-points of the opposite sides bisect each other.


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a

True

b

False 

answer is A.

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Detailed Solution

Given that, the line segments of a quadrilateral joining the mid-points of the opposite sides bisect each other.
Question ImageThe points P, Q, R and S are the midpoints of AB, BC, CD and DA respectively. The diagonal is AC.
In ΔADC  , the midpoint of AD is S and CD is R. From midpoint theorem,
SR || AC and SR= 1 2 AC  ………… [1]
For ΔABC  , midpoint of AB is P and BC is Q. From midpoint theorem,
PQ || AC and PQ= 1 2 AC  ………... [2]
On comparing [1] and [2] we get:
PQ=SR= 1 2 AC and PQ||SR  .
Similarly,
PS=QR= 1 2 BD and PS||QR  .
A quadrilateral with a pair of equal parallel sides is a parallelogram. Thus, PQRS is a parallelogram.
The diagonals of a parallelogram bisect each other.
OS=OQ and OP=OR  
Thus, the line segments joining the midpoints of the sides will bisect each other. Hence, the statement is true.
Therefore, the correct option is 1.
 
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State whether the statement is true or false.The line segments of a quadrilateral joining the mid-points of the opposite sides bisect each other.