please help me please please
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Step-by-step explanation:
In Δ OPQ
OA/AP = OB/BQ [BPT (Basic Proportional Theorem)] -------- eq(I)
In Δ OPR
OA/AP = OC/CR [BPT (Basic Proportional Theorem)] ------- eq(II)
From the equation (I) & (II)
OB/BQ = OC/CR
Hence BC║QR
Remark
BPT (Basic Proportional Theorem) states that If a line is drawn parallel to one side of a triangle to intersect the other two side in distinct points then the other two sides are divided in the present ratio.
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