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The area of a circle is 81pi mm^2. What’s its circunferencia?

Solución

The area of a circle is 81\pi mm^{2}. What’s its circumference?

Solución

c i rc u m f ere n ce : 18 π mm

+1

Notación decimal

56.54866 \dots

Pasos de solución

Given:

a re a : 81 π m m^{2}

Radio del circulo dado

A re a = 81 π : r = 9

Circunferencia del circulo dada

r = 9 : C = 18 π

c i rc u m f ere n ce : 18 π mm

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