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Question
In Δ DEF, line PQ || side EF, If DP = 2.4,
PE = 7.2, DQ = 1 then find QF.
Solution
In Δ DEF,
line PQ || side EF
∴ `("DP")/("PE") = ("DQ")/("QF")` (∵ Basic proportionality Theoram)
∴ `2.4/7.2= 1/("QF")`
∴ `"QF" xx 2.4 = 7.2`
∴ QF = `7.2/2.4`
∴ QF = 3
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