1). <M=<A=40°. <N=<B=86°. <K=<C=54°
2) EF:AB=28:14=2, DE=AC:2=40*2=80, DF=30*2=60
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1). <M=<A=40°. <N=<B=86°. <K=<C=54°
2) EF:AB=28:14=2, DE=AC:2=40*2=80, DF=30*2=60