380.13 square cm.
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the area of a circle found using pi r square. the radius is half the diameter therefore the radius is 2.8 = 22/7x 2.8^2=24.64
22
The diameter of a 22 circumference circle is: 7
The diameter of a circle is 56 cm. What is the circumference of the circle? Use 22/7 to approximate for pi.
Divide the area by pi. (3.14 or 22/7) Find the square root of your answer. This will be the radius. Multiply the raduis by 2.