Math help please!!!

Question

Circumference of a Circle

C=d or C=2r

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

Work:

C =

Work:

C =

Work:

C =

4.  Circle, radius = 3.5 ft

5. Circle, diameter = 9 in

6. Circle, radius = 5 mm

7. The circumference of a circle is 34.54 cm. What is the diameter and radius of the circle? (Show work)

8. What is the circumference of a circle in terms of , if it has a radius of 3.5 in?

(in terms of means do not substitute 3.14 for pi, leave the symbol in the final answer)

Answer 1

Hi School,

1. is C = 2 ( 3.5) 3.14= 21.98 ft
2. is C= d ( 3.14) = 9 in ( 3.14 ) = 28.26 in
3. is C = 2 r (3.14)= 2 (5 mm) ( 3.14 )= 31.4 mm
4. .C= 3.14 ( d ) =34.54 = d 3.14 = do the math d= 11 cm radius is 1/2 diameter or ?
5. C= 2 r pi =C 2 ( 3.5 ) pi then do the math.

hope this helps.

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