7th grader...please help

Mathematics
Tutor: None Selected Time limit: 1 Day

Apr 29th, 2015

from the figure ,the circle is drawn using the radius ,R = 7.25cm

radius = 7.25 cm..............................answer

diameter  =  2 * radius of circle

                 = 2 * 7.25 cm.

                =15 cm..........................................answer

circumference of a circle = 2 π *radius                             ( π = pi)hope you know it and value of π = 3.14

                                         = 2 π 7.25 

                                         = 15 π      cm...................answer 

                                          =  47.1    cm .............answer

area of circle =  π r^2

                       =   π *7.25*7.25

                      =   52.5625 π    cm^2 .....................answer 

                      =   165.04625     cm^2..................answer


hope you understood...please message if you have any doubts...thank you

              

    

                                    


Apr 29th, 2015

iam sorry.....there is a typing mistake in diameter and circumference...everything else is correct 


radius = 7.25 cm..............................answer

diameter  =  2 * radius of circle

                 = 2 * 7.25 cm.

                =  14.5  cm..........................................answer

circumference of a circle = 2 π *radius                             ( π = pi)hope you know it and value of π = 3.14

                                         = 2 π 7.25 

                                        = 14.5  π      cm...................answer 

                                        ≈   45.53      cm ..................answer

area of circle =  π r^2

                       =  π *7.25*7.25

                      =   52.5625 π    cm^2 .....................answer 

                       ≈   165.04625     cm^2..................answer



please change the answer from the previous submit with this.........

Apr 29th, 2015

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