1. r=a/(2√3)=√3 ⇒ a=√3*2√3=6P=3*6=18S=(1/2)*6*6*sin60° или r=2S/P, S=P*r/2, S=18√3/2=9√32.
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1. r=a/(2√3)=√3 ⇒ a=√3*2√3=6P=3*6=18S=(1/2)*6*6*sin60° или r=2S/P, S=P*r/2, S=18√3/2=9√32.