ALFA= 200
R= 15
l=200/360*2pi*15=
=5/9*2pi*15=5/9*30pi=16 i 2/3 pi
5/9*2pi*15=5/9*2*3,14*15=5/9*94,2
5*94,2=471
471:9=52,(3)
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=5/9*2pi*15=5/9*30pi=16 i 2/3 pi
5/9*2pi*15=5/9*2*3,14*15=5/9*94,2
5*94,2=471
471:9=52,(3)