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Mathematics, 05.05.2020 06:23 Jsusussueususu

PLEASE HELP ( 15points) I'll mark Brainlliest
Select all of the true statements.
a. π is the area of a circle of radius 1 unit.
b. π is the area of a circle of diameter 1 unit.
c. π is the circumference of a circle of radius 1 unit.
d. π is the circumference of a circle of diameter 1 unit.
e. π is the constant of proportionality relating the diameter of a circle to its circumference.
f. π is the constant of proportionality relating the radius of a circle to its area

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PLEASE HELP ( 15points) I'll mark Brainlliest
Select all of the true statements.
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