Asked by briana
                the circumference of a circle is 18*3.14cm. The radius is increased, and the circumferenceof the new circle is 16*3.14cm. by how much was the radius of the oringinal circle increased?
            
            
        Answers
                    Answered by
            Bosnian
            
    C = 2 * r * pi
1 case :
18 * pi = 2 * r * pi Divide both sides by ( 2 * pi )
18 * pi / ( 2 * pi ) = 2 * r * pi / ( 2 * pi )
9 = r
r = 9 cm
2 case :
16 * pi = 2 * r * pi Divide both sides by ( 2 * pi )
16 * pi / ( 2 * pi ) = 2 * r * pi / ( 2 * pi )
8 = r
r = 8 cm
9 - 8 = 1 cm
    
1 case :
18 * pi = 2 * r * pi Divide both sides by ( 2 * pi )
18 * pi / ( 2 * pi ) = 2 * r * pi / ( 2 * pi )
9 = r
r = 9 cm
2 case :
16 * pi = 2 * r * pi Divide both sides by ( 2 * pi )
16 * pi / ( 2 * pi ) = 2 * r * pi / ( 2 * pi )
8 = r
r = 8 cm
9 - 8 = 1 cm
                    Answered by
            w
            
    no
    
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