Q18 of 168 Page 5

The areas of two similar triangles ABC and PQR are in the ratio 9 : 16. If BC = 4.5 cm, find the length of QR.

We have,


ABCPQR


Area() =BC2


Area () QR2


(4.5)2/QR2=9/16


4.5/QR=3/4


QR=4x4.5/3


QR=6cm


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