Circumference = pi * diameter
28.26 = 3.14159 * d
d = 28.26 / 3.14159
d = 9.00
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(pi) π=3.14 r²= radius to the second power A = πr² A = π * 6² A = π * 36π A = 3.14 * 36 A = 113.04
its a 4 by atleast 50 by atleast 4 centimeters
False
A sector.
Disc shaped.