What is the area of a circle with a diameter of 10 millimeters? Estimate the area to the tenths place using 3.14 for pi (1 point)
314 square mm
78.5 square mm
15.7 square mm
79 square mm
To find the area of a circle, we use the formula A = πr², where π is pi and r is the radius of the circle.
Given that the diameter of the circle is 10 millimeters, we can find the radius by dividing the diameter by 2:
radius = diameter/2 = 10 mm / 2 = 5 mm
Now, we can substitute the radius into the formula:
A = 3.14 * (5 mm)² = 3.14 * 25 mm² = 78.5 mm²
Therefore, the estimated area to the tenths place using 3.14 for pi is 78.5 square mm.
To find the area of a circle, we can use the formula:
Area = π * (radius)^2
However, in this case, we are given the diameter instead of the radius. So, we need to find the radius first.
The radius is half of the diameter. Given that the diameter is 10 mm, the radius would be 10 mm / 2 = 5 mm.
Now, we can substitute the radius value into the formula:
Area = 3.14 * (5 mm)^2
Area = 3.14 * 25 mm^2
Area = 78.5 square mm
Therefore, the estimated area of the circle is 78.5 square mm.
To calculate the area of a circle, you can use the formula:
Area = π * (radius)^2
The radius of a circle is half of its diameter. Given that the diameter is 10 millimeters, the radius would be 10/2 = 5 millimeters.
Now, substitute the value of the radius into the formula to find the area:
Area = 3.14 * (5)^2
Area = 3.14 * 25
Area ≈ 78.5 square mm
Therefore, the estimated area of a circle with a diameter of 10 millimeters, to the tenths place using 3.14 for pi, is 78.5 square mm.