How to prove ???????
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DE || OQ
By Proportionality theorem
>> PD/DO = PE/EQ (1)
DF || OR
By Proportionality theorem
>> PD/DO = PF/FR (2)
From (1) & (2)
PE/EQ = PF/FR
By Converse of Proportionality theorem
>> EF || QR
hence proved
By Proportionality theorem
>> PD/DO = PE/EQ (1)
DF || OR
By Proportionality theorem
>> PD/DO = PF/FR (2)
From (1) & (2)
PE/EQ = PF/FR
By Converse of Proportionality theorem
>> EF || QR
hence proved
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