What is the area of a circle with a radius of 2.1 miles? Estimate the area to the hundredths place using 3.14 for π
.(1 point)
This particular artwork can be viewed by some to be appealing to the eye or beautiful. What characteristic of the work is being described?
(1 point)
The area of a circle is calculated using the formula A = πr^2, where A is the area and r is the radius.
Given that the radius is 2.1 miles, we can substitute this value into the formula:
A = 3.14 * (2.1)^2
A = 3.14 * 4.41
A ≈ 13.8174
Rounding to the hundredths place, the estimated area of the circle is 13.82 square miles.
What is the area of a circle with a diameter of 16 yards? Estimate the area to the hundredths place using 3.14 for π
.(1 point)
The radius of a circle is half of its diameter. So, in this case, the radius would be 16 yards / 2 = 8 yards.
To calculate the area of the circle, we will use the formula A = πr^2, where r is the radius.
Substituting the radius into the formula:
A = 3.14 * (8)^2
A = 3.14 * 64
A ≈ 200.96
Rounding to the hundredths place, the estimated area of the circle is 200.96 square yards.
What is the circumference of a circle with a diameter = 4 feet? Which of the following is the best estimation for the circumference?(1 point)
Responses
6 feet
6 feet
13 feet
13 feet
50 feet
50 feet
25 feet
The circumference of a circle can be calculated using the formula C = πd, where C is the circumference and d is the diameter.
In this case, the diameter is given as 4 feet.
Substituting the diameter into the formula:
C = 3.14 * 4
C = 12.56
Rounding to the nearest whole number, the best estimation for the circumference of the circle is 13 feet. So the correct answer is 13 feet.
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
10.21 meters
10.21 meters
10.22 meters
10.22 meters
10.2 meters
10.2 meters
33.18 meters
The circumference of a circle can be calculated using the formula C = πd, where C is the circumference and d is the diameter.
In this case, the diameter is given as 3.25 meters.
Substituting the diameter into the formula:
C = 3.14 * 3.25
C ≈ 10.205
Rounding to the hundredths place, the estimated circumference of the circle is 10.21 meters. So 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)
The circumference of a circle with radius r can be calculated using the formula C = 2πr, where C represents the circumference and r represents the radius.
In this case, the radius is given as 2.5 feet.
Substituting the radius into the formula:
C = 2 * 3.14 * 2.5
C ≈ 15.7
Rounding to the tenths place, the estimated circumference of the circle is 15.7 feet. So the correct answer is 15.7 feet.