If △DEF and △PQR are similar, If EF:QR is in ratio 1:9 , then ratio of areas of △PQR & △DEF ?
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Given △ABC∼△PQR
∴
area(△PQR)
area(△ABC)
=
QR
2
BC
2
⟹
16
9
=
QR
2
4.5
2
QR=
3
4×4.5
∴QR=6cm
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