Question

What are the other formula's for area of a circle that is not pi r^2

Answer 1

Answer:

$a = \frac{ {c}^{2} }{4\pi}$

where c=circumference

Step-by-step explanation:

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Answer 2

Answer:

Calculator. Enter the radius, diameter, circumference or area of a Circle to find the other three. ... of a circle is: π (Pi) times the Radius squared:A = π r2.