in the triangle POQ and ROS, O is the midpoint prove that 2OP=PR
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given : PQ||RS
O is mid pt. of PS i.e. PO=OS
To prove : PQ=RS
Proof: In ∆POQ and ∆ROS
anglePOQ = angleROS (vertical opposite angles)
PO=OS (prooved above)
anglePQO =angle ORS (alternate interior angle)
By AAS congruence , ∆POQ congruent to ∆ORS
By cpct , PQ=RS
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