Sr= корень(100^2-60^2)
Sr=80cm
200:80=x:60
x=(60*200):80=150cm
R=150cm
>>>>>>150cm<<<<<<
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Sr= корень(100^2-60^2)
Sr=80cm
200:80=x:60
x=(60*200):80=150cm
R=150cm
>>>>>>150cm<<<<<<