we put a copper wire to wind around the ciecle whose diameter is 30 cm ,just can be wound 12 rings,can you work out the length of the copper?if the perimeter of a rectangle and a square is equal ,if the length of the square is 3.5dm,the length of rec
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![we put a copper wire to wind around the ciecle whose diameter is 30 cm ,just can be wound 12 rings,can you work out the length of the copper?if the perimeter of a rectangle and a square is equal ,if the length of the square is 3.5dm,the length of rec](/uploads/image/z/2106621-45-1.jpg?t=we+put+a+copper+wire+to+wind+around+the+ciecle+whose+diameter+is+30+cm+%2Cjust+can+be+wound+12+rings%2Ccan+you+work+out+the+length+of+the+copper%3Fif+the+perimeter+of+a+rectangle+and+a+square+is+equal+%2Cif+the+length+of+the+square+is+3.5dm%2Cthe+length+of+rec)
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