What is the circumference of a circle with a diameter of 3.25 meters? Estimate the circumference to the hundredths place using 3.14 for π
.(1 point)
Responses
10.2 meters
10.2 meters
10.21 meters
10.21 meters
10.22 meters
10.22 meters
33.18 meters
The circumference of a circle can be found using the formula C = πd, where C is the circumference and d is the diameter.
Given that the diameter is 3.25 meters, the circumference can be calculated as:
C = 3.14 * 3.25 = 10.205 meters
Rounded to the hundredths place, the estimated circumference is 10.21 meters.
Therefore, the correct answer is 10.21 meters.
What is the circumference of a circle with a radius of 2.5 feet? Estimate the circumference to the tenths place using 3.14 for π
.(1 point)
Responses
15.6 feet
15.6 feet
15.7 feet
15.7 feet
16 feet
16 feet
7.85 feet
The circumference of a circle can be found using the formula C = 2πr, where C is the circumference and r is the radius.
Given that the radius is 2.5 feet, the circumference can be calculated as:
C = 2 * 3.14 * 2.5 = 15.7 feet
Rounded to the tenths place, the estimated circumference is 15.7 feet.
Therefore, the correct answer is 15.7 feet.
What is the area of a circle with a radius of 12 feet? Estimate the area to the hundredths place using 3.14 for π
.(1 point)
Responses
452.16 square feet
452.16 square feet
452.2 square feet
452.2 square feet
75.4 square feet
75.4 square feet
113.04 square feet
The area of a circle can be found using the formula A = πr^2, where A is the area and r is the radius.
Given that the radius is 12 feet, the area can be calculated as:
A = 3.14 * 12^2 = 3.14 * 144 = 452.16 square feet
Rounded to the hundredths place, the estimated area is 452.16 square feet.
Therefore, the correct answer is 452.16 square feet.
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
.(1 point)
Responses
78.5 square mm
78.5 square mm
79 square mm
79 square mm
15.7 square mm
15.7 square mm
314 square mm
314 square mm
The area of a circle can be found using the formula A = πr^2, where A is the area and r is the radius. However, in this case, the given measurement is the diameter, not the radius.
To find the radius, we can divide the diameter by 2:
Radius = Diameter / 2 = 10 mm / 2 = 5 mm
Now we can calculate the area using the formula:
A = πr^2 = 3.14 * 5^2 = 3.14 * 25 = 78.5 square mm
Rounded to the tenths place, the estimated area is 78.5 square mm.
Therefore, the correct answer is 78.5 square mm.
Thx
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To find the circumference of a circle, you can use the formula C = π * d, where C represents the circumference and d represents the diameter of the circle.
In this case, the diameter given is 3.25 meters, so the formula becomes C = 3.14 * 3.25.
Multiplying 3.14 by 3.25 gives you 10.185, which you can round to the nearest hundredths place to get 10.19 meters.
Therefore, the estimated circumference of the circle with a diameter of 3.25 meters is 10.19 meters.