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skelet666 [1.2K]
3 years ago
13

Find the circumference of each circle, use 3.14 for . Include units and round to the nearest tenth. Show work

Mathematics
1 answer:
klio [65]3 years ago
8 0

Answer:

Answer:-

a) <em>The circumference of the circle  C = 21.98 m</em>

<em>b) The circumference of the circle  C = 37.68 ft</em>

<em>c)  The circumference of the circle  C = 40.82 km</em>

<em>d) The radius of the circle = r = 11 c.m</em>

<em>     The Diameter of the circle 'd' = 2(r) = 2(11) =22 c.m</em>

<em>e) The circumference of the circle = 21.98 inches</em>

<em>   </em><u>Step-by-step explanation</u>:

a)  In First diagram

Given radius of the circle 'r' = 7.1 m

  <em> The circumference of the circle  C = 2πr</em>

                                                            C = 2 (3.14) (7.1)

                                                            C = 21.98 m

<em> The circumference of the circle  C = 21.98 m</em>

b) In second diagram

Given diameter of the circle 'd' = 12 ft

   The circumference of the circle  C = 2πr

                                                            C = π(2 r)

                                       Diameter = 2 X radius

                                               d = 2 r

 The circumference of the circle  C = πd

                                                          C = 3.14 ×12

<em> The circumference of the circle  C = 37.68 ft</em>

<em>c) </em>

Given diameter of the circle 'd' = 13 km

   The circumference of the circle  C = 2πr

                                                            C = π(2 r)

                                       Diameter = 2 X radius

                                               d = 2 r

 The circumference of the circle  C = πd

                                                          C = 3.14 ×13

 <em>The circumference of the circle  C = 40.82 km</em>

   

7) The circumference of the circle  C = 2πr

    Given The circumference of a circle is 34.54 cm

          Now       2πr = 34.54

                   2(3.14) r = 34.54

                           r = \frac{34.54}{3.14} = 11

  <em>  The radius of the circle = r = 11 c.m</em>

<em>     The Diameter of the circle 'd' = 2(r) = 2(11) =22 c.m</em>

8) Given radius of the circle 'r' = 3.5 inches

   The circumference of the circle  C = 2πr

                                                            C = 2 (3.14) (3.5)

                                                            C = 21.98

  <em>The circumference of the circle = 21.98 inches</em>

 

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