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z gory dziekuje
a=12
sinα=a/c
sin60=12/c
√3/2=12/c
√3c=24
c=24/√3=24/√3*√3/√3=24√3/3=8√3
cosα=b/c
cos60=b/8√3
1/2=b/8√3
2b=8√3
b=4√3
P=a*b/2=12*4√3/2=24√3
Ob=a+b+c=12+4√3+8√3=12+12√3