S=1/2*KL*KM*sinK
60=1/2*15*KL*1/2
60=15/4*KL
KL=60:15/4
KL=16 см.
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S=1/2*KL*KM*sinK
60=1/2*15*KL*1/2
60=15/4*KL
KL=60:15/4
KL=16 см.