По теореме Пифагора
AB^2=CB^2+AC^2
5^2= x^2+(2x)^2
25=5x^2
x^2=5
x=√5=CB
AC=2√5
Ответ:2√5
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По теореме Пифагора
AB^2=CB^2+AC^2
5^2= x^2+(2x)^2
25=5x^2
x^2=5
x=√5=CB
AC=2√5
Ответ:2√5