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A circle has a diameter of 28 centimeters.
Estimate the area of the circle. Use
22
7
for
π
.
area = πr^2 = π*14^2 = 196π = ...
To estimate the area of a circle, we first need to find its radius. The radius of a circle is half of its diameter, so in this case, the radius would be:
Radius = Diameter / 2 = 28 cm / 2 = 14 cm
Next, we can use the formula for the area of a circle to calculate an estimate:
Area = π * radius^2
Substituting the values in, we get:
Area ≈ 22/7 * 14^2
Calculating the square of the radius:
Area ≈ 22/7 * 196
Evaluating the multiplication:
Area ≈ 616 cm^2
Therefore, the estimated area of the circle is approximately 616 square centimeters.