The circumference of the circle is 72.22 mm.
Circumference can be found by multiplying pi or 3.14 by the diameter.
C=×d
C=3.14×23 mm
C=72.22 mm
The area of the circle is 415.265 mm².
A=r²
A=3.14×11.5² mm
A=3.14×132.25 mm
A=415.265 mm²
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