Respuesta :

nb32193

Answer:

1. r= 5

5x2= 10

d= 10

10x3.14=31.4

C= 31.4

round to nearest unit

C=31mm

2. r= 11

11/2=5.5

d= 5.5

5.5x3.14=17.27

c=17 in

3. r=5m

d=10

c= 31

4. c=72

5. c=19

6. c=47

Step-by-step explanation:

going from top left to right

Esther

Answer:

Step-by-step explanation:

  • Circumference of a circle is: C = 2*π*r
  • π = 3.14
  • d = diameter
  • r = radius (r = d/2)

8. r = 5 mm.

C = 2*π*r

C = 2*3.14*5

C = 10*3.14

C = 31.4 mm.

C = 31 mm

9. r = 11 in.

C = 2*π*r

C = 2*3.14*11

C = 22*3.14

C = 69.08

C = 69 in.

10. r = 0.5 m

C = 2*π*r

C = 2*3.14*0.5

C = 1*3.14

C = 3.14 m

11. d = 23 ft

r = 23/2 = 11.5 ft

C = 2*π*r

C = 2*3.14*11.5

C = 23*3.14

C = 72.22 ft

C = 72 ft

12. d = 6 cm

r = 6/2 = 3 cm

C = 2*π*r

C = 2*3.14*3

C = 6*3.14

C = 18.84

C = 19 cm

13. d = 15 in.

r = 15/2 = 7.5 in.

C = 2*π*r

C = 2*3.14*7.5

C = 15*3.14

C = 47.1 in.

C = 47 in.

Hope this helps!

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