A diogonal of a quadrilateral are ABCD are perpendicular to each other . Show. that the quadrilateral formed by joining the mid points of its sides is a rectangle
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Here, ABCD is a quadrilateral. AC and BD are diagonals, which each perpendicular to each other.
P,Q,R and S are the mid-point of AB,BC,CD and AD respectively.
In △ABC,
P and Q are mid points of AB and BC respectively.
∴ PQ∥AC and PQ=
2
1
AC ----- ( 1 ) [ By mid-point theorem ]
Similarly, in △ACD,
R and S are mid-points of sides CD and AD respectively.
∴ SR∥AC and SR=
2
1
AC -----
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