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  • 5 years ago

triangle ABC & triangle DEF,<A=<D,<b=<E,when BC =6.72cm,AB=4.8cm,CA=12cm,and FD=20cm. find the sum of :de+ef

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  1. anonymous
    • 5 years ago
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    triangle ABC and DEF are similar. AB/DE=AC/DF=BC/EF; 4.8/DE=12/20=6.72/EF; DE=8. and EF=11.2 DE+EF=19.2

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