Answer :
Given, Ab = 7.5cm, DC = ycm, EF = 4.5cm and BC = xcm
Need to calculate values of x and y
⇒ Let us consider Δ ACB and Δ CEF
⇒ Both are similar triangles
∴ 
⇒ x = 5cm
⇒ let us consider Δ BCD and Δ BFE
⇒ from basic proportionality theorem we have we know that line drawn parallel to one side of the triangle, intersects the other two sides in distinct points, then it divides the other 2 side in same ratio.
⇒ 
⇒ y = 
⇒ Y = 
⇒ Y = 
Hence, the value of X is 5cm and Y is 
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