Question

LALRUISE /
1. AABC – ADEF and their areas are respectively 64 cmand 121 cm 16
EF = 15.4 cm, find BC.​

Answer 1

△ABC∼△DEF

⟹

Ar(ΔABC)/Ar(∆DEF)=(BC/EF)^2

64/121=(BC/15.4)^2

BC=√64/√121*15.4

BC=8/11*15.4

=11.2cm

Answer 2

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