What is the area of a circle with a diameter of 10 millimeters? Estimate the area to the tenths place using 3.14 for π
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The radius of the circle is half of the diameter, so the radius would be 10 millimeters divided by 2, which is 5 millimeters.
Using the formula for the area of a circle, which is A = πr^2, we can substitute the radius into the formula and estimate the area.
A = 3.14 * 5^2
A = 3.14 * 25
A ≈ 78.5
Therefore, the estimated area of the circle is 78.5 square millimeters.
To calculate the area of a circle, you can use the formula A = πr^2, where A represents the area and r represents the radius. The diameter of a circle is twice the length of the radius, so to find the radius, you need to divide the diameter by 2.
Given that the diameter is 10 millimeters, the radius would be 10 mm / 2 = 5 mm.
Now, plug this value into the formula and solve for the area:
A = πr^2
A = 3.14 * (5 mm)^2
A = 3.14 * 25 mm^2
A ≈ 78.5 mm^2
Estimating the area to the tenths place using 3.14 for π, the area of the circle with a diameter of 10 millimeters is approximately 78.5 square millimeters.
To find the area of a circle, you can use the formula:
Area = π * (radius)^2
In this case, the diameter is given as 10 millimeters.
To find the radius, you need to divide the diameter by 2:
radius = 10 mm / 2 = 5 mm.
Next, you can substitute the value of the radius into the formula:
Area = 3.14 * (5 mm)^2 = 3.14 * 25 mm^2 = 78.5 mm^2.
Therefore, the area of the circle with a diameter of 10 millimeters is 78.5 square millimeters.