Answer:
radius=1/2 multiplied by diameter
r=1/2 multiplied by 5
r=2.5
formula=area of circle =pie into r²
22/5 into (2.5)²=area
22/5 multiplied by 6.25=area
22multiplied by 1.25 =area (6.25divided by 5=1.25)
27.5=area of circle
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