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PLEASE ANYONE HELP ME? :D

PLEASE ANYONE HELP ME D class=

Sagot :

9514 1404 393

Answer:

  B, C

Step-by-step explanation:

The equation for the circumference C of a circle of diameter d is ...

  C = πd

That is, π is the constant of proportionality between circumference and diameter.

Clearly, when the diameter is 1, the circumference will be π.

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π is the circumference when diameter is 1.

π is the constant of proportionality between circumference and diameter.