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
The radius of a circle is half its diameter. In this case, the radius is (10 mm)/2 = 5 mm.
The formula to calculate the area of a circle is A = πr^2. Plugging in π as 3.14 and the radius as 5 mm, we can calculate the area.
A = 3.14 * (5 mm)^2
A = 3.14 * 25 mm^2
A = 78.5 mm^2
Therefore, the area of the circle is approximately 78.5 square millimeters.
To find the area of a circle, we can use the formula: A = π * r^2, where A is the area and r is the radius.
Since the diameter is given as 10 millimeters, we can divide it by 2 to find the radius.
The radius (r) = diameter / 2 = 10 mm / 2 = 5 mm.
Now, we can substitute the values into the formula:
A = π * r^2 = 3.14 * 5^2 = 3.14 * 25 = 78.5 mm^2.
To estimate the area to the tenths place, we round the result to one decimal place.
So, the estimated area of the circle is 78.5 mm^2, rounded to the tenths place.
To find the area of a circle, you can use the formula A = πr^2, where A represents the area and r represents the radius.
Given that the diameter is 10 millimeters, we need to first find the radius. The radius is half the length of the diameter, so the radius would be 10 mm / 2 = 5 mm.
Now we can plug the radius into the formula:
A = πr^2 = π(5 mm)^2
Using the approximation value of π as 3.14, we can further simplify:
A ≈ 3.14(5 mm)^2 = 3.14(25 mm^2)
Calculating this:
A ≈ 78.5 mm^2
Therefore, the estimated area of a circle with a diameter of 10 millimeters is 78.5 square millimeters, rounded to the tenths place.