when the diameter is given you just need to multiply it with the pi/π or simply 3.14
but if the given is radious, you need to times the pi/π to 2 or simply 6.28 then afterwards multiply 6.28 to the radious.. as for number 5 it is clear that the given is a diameter because it is said across the pool hope u get it...
Answers & Comments
1. C = πd
= 3.14(15)
= 47.1in
2. C = 2πr
= 2(3.14)(6)
= 37.68cm
3. C = πd
= 3.14(3)
= 9.42in
4. C = 2πr
= 2(3.14)(25)
= 15cm
5. C = πd
= 3.14(20)
= 62.8m
Answer:
47.1 in
37.68 cm
9.42 in
157 cm
62.8m
Step-by-step explanation:
c=2π•r
c=π•d
when the diameter is given you just need to multiply it with the pi/π or simply 3.14
but if the given is radious, you need to times the pi/π to 2 or simply 6.28 then afterwards multiply 6.28 to the radious.. as for number 5 it is clear that the given is a diameter because it is said across the pool hope u get it...