Г=45\9=60\12=5 F=15 d- ?
1\F=1\d+1\f=1\d+1\5*d=(5+1)\5d
5d=6F
d=6*15\5=18 см
Ответ d=18 см
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Г=45\9=60\12=5 F=15 d- ?
1\F=1\d+1\f=1\d+1\5*d=(5+1)\5d
5d=6F
d=6*15\5=18 см
Ответ d=18 см