Question

If triangle ABC is similar to triangle DEF and AB=3DE with ar(triangleABC)=144cm^2.find ar(triangle DEF)

Answer 1

AB=3DE
AB/DE=3/1
ar ( ABC)/ ar (DEF)=(AB/DE)^2
144/ar (DEF)=(3/1)^2
144/ar (DEF)=9/1
ar (DEF)=144/9
ar (DEF)=16cm^2

Answer 2

Answer is attached

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