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{Δ ABC≈Δ DEF\quad\operatorname{ar}(Δ ABC)=9cm^2, ar }(Δ DEF)=16}{cm^2. If }BC=2.1cm , then the measure of EF is |
| Answer» {Δ ABC≈Δ DEF\quad\operatorname{ar}(Δ ABC)=9cm^2, ar }(Δ DEF)=16}{cm^2. If }BC=2.1cm , then the measure of EF is | |