in triangle abc p and q are points of ab and ac respectively if bc + pq =21 cm then find bc.
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Step-by-step explanation:
In △ABC, PQ∥BC
So, by proportionality theorem
PB
AP
=
QC
AQ
=
BC
PQ
6
4
=
QC
AQ
=
BC
3
⇒
6
4
=
BC
3
∴ BC=4.5cm
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