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h=a/2√3
r=a/6√3
Dane a=4cm
α=60
w -wys sciany bocznej
Sc=Sp+3Sb
Sp=1/4a²√3=1/4*16*√3=4√3
Sb=1/2a*w
w=r/cos60=a/6√3*2=4*2/6√3
Sb=1/2*4*4/3√3=8/3√3
Sc=4√3+8√3=12√3