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A circle has a diameter of 28 centimeters. Estimate the area of the circle. Use 22/7 for π.
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Answer:

616 cm²

Step-by-step explanation:

To find the area of a circle you use the formula A = π · r²

So we know that the diameter is 28 cm, to find the radius we would divide this in half, because d = 2r, giving us 14. Now we can do 14² which is 196, and then times that by pi or in this case 22/7.

196 × (22/7) = 616

Answer:

616 square centimeters

Step-by-step explanation:

Diameter of circle = 28 centimeters

π = 22/7

Area of a circle, A = π [tex]\frac{D^{2} }{4}[/tex]

A =  [tex]\frac{22}{7}[/tex] * [tex]\frac{28^{2} }{4}[/tex]

A =  [tex]\frac{22}{7^{1} }[/tex] * [tex]\frac{(4 * 7)^{2} }{4}[/tex]

A =  [tex]\frac{22}{7^{1} }[/tex] *  [tex]\frac{4^{2} *7^{2} }{4}[/tex]

A = 22 * 28

A = 616 square centimeters