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A circle has a diameter of 28 centimeters.
Estimate the area of the circle. Use
22/7
for
π
.
r = 28/2 = 14, so
A = πr^2 = 196π
To estimate the area of the circle, we need to use the formula for the area of a circle: A = πr^2, where A is the area and r is the radius.
Given that the diameter of the circle is 28 centimeters, we can find the radius by dividing the diameter by 2. So, the radius (r) of the circle is 28/2 = 14 centimeters.
Now, let's substitute the value of the radius into the formula and use the approximation of π as 22/7:
A ≈ (22/7) * (14^2)
≈ (22/7) * (196)
≈ 22 * (196/7)
≈ 22 * 28
≈ 616 square centimeters.
So, the estimated area of the circle is approximately 616 square centimeters.