The correct formula to find the approximate circumference of a circle is C = 2πr, where r is the radius of the circle.
Using this formula, the approximate circumference of a circle with a radius of 12 would be:
C = 2π(12)
C = 24π
Since the question instructs us to use 3.14 for π, we can substitute it into the formula:
C = 24(3.14)
C = 75.36
Therefore, the correct answer is 75.36.
Which of the following uses the correct formula to find the approximate circumference of a circle that has a radius of 12? Use 3.14 for π and express your answer to the hundredths place.(1 point)
Responses
452.16
452.16
18.84
18.84
75.36
75.36
37.68
9 answers
Which of the following uses the correct formula to find the approximate circumference of a circle that has a radius of 450?(1 point)
Responses
C≈3.14⋅4502
upper C approximately equals 3.14 times 450 squared
C≈3.14⋅450÷2
upper C approximately equals 3.14 times 450 divided by 2
C≈2⋅3.14⋅450
upper C approximately equals 2 times 3.14 times 450
C≈3.14⋅150
Responses
C≈3.14⋅4502
upper C approximately equals 3.14 times 450 squared
C≈3.14⋅450÷2
upper C approximately equals 3.14 times 450 divided by 2
C≈2⋅3.14⋅450
upper C approximately equals 2 times 3.14 times 450
C≈3.14⋅150
The correct formula to find the circumference of a circle is C = 2πr, where r is the radius of the circle.
Using this formula, the approximate circumference of a circle with a radius of 450 would be:
C = 2π(450)
Since the question instructs us to use 3.14 for π, we can substitute it into the formula:
C = 2(3.14)(450)
C = 2(1413)
C = 2826
Therefore, the correct answer is C ≈ 2⋅3.14⋅450.
Using this formula, the approximate circumference of a circle with a radius of 450 would be:
C = 2π(450)
Since the question instructs us to use 3.14 for π, we can substitute it into the formula:
C = 2(3.14)(450)
C = 2(1413)
C = 2826
Therefore, the correct answer is C ≈ 2⋅3.14⋅450.
Which formula correctly describes the proportional relationship between the circumference of a circle and the diameter?(1 point)
Responses
A=πr2
upper A equals pi r squared
C=πd
upper C equals Start Fraction pi over d End Fraction
Cd=π
Start Fraction upper C over d End Fraction equals pi
π=dC
Responses
A=πr2
upper A equals pi r squared
C=πd
upper C equals Start Fraction pi over d End Fraction
Cd=π
Start Fraction upper C over d End Fraction equals pi
π=dC
The correct formula that describes the proportional relationship between the circumference of a circle and the diameter is:
C = πd
Here, C represents the circumference and d represents the diameter. This formula states that the circumference of a circle is equal to π (pi) multiplied by the diameter.
Therefore, the correct answer is C = πd.
C = πd
Here, C represents the circumference and d represents the diameter. This formula states that the circumference of a circle is equal to π (pi) multiplied by the diameter.
Therefore, the correct answer is C = πd.
Use the correct formula to find the area of a circle if the diameter is 21 mi. Round to the nearest hundredths place. Use 3.14 for π .(1 point)
Responses
346.19 mi.2
346.19 mi squared
131.88 mi.2
131.88 mi squared
1,384.74 mi.2
1,384.74 mi squared
65.94 mi.2
Responses
346.19 mi.2
346.19 mi squared
131.88 mi.2
131.88 mi squared
1,384.74 mi.2
1,384.74 mi squared
65.94 mi.2
The correct formula to find the area of a circle is A = πr^2, where r is the radius of the circle.
Given that the diameter is 21 mi, the radius can be found by dividing the diameter by 2:
r = 21 mi / 2 = 10.5 mi
Now, substituting the value of the radius into the formula and using 3.14 for π:
A = π(10.5 mi)^2
A = 3.14 * (10.5 mi)^2
A = 3.14 * 110.25 mi^2
A ≈ 346.19 mi^2 (rounded to the nearest hundredth)
Therefore, the correct answer is 346.19 mi^2.
Given that the diameter is 21 mi, the radius can be found by dividing the diameter by 2:
r = 21 mi / 2 = 10.5 mi
Now, substituting the value of the radius into the formula and using 3.14 for π:
A = π(10.5 mi)^2
A = 3.14 * (10.5 mi)^2
A = 3.14 * 110.25 mi^2
A ≈ 346.19 mi^2 (rounded to the nearest hundredth)
Therefore, the correct answer is 346.19 mi^2.
Which of the following is the correct formula for finding the area of a circle?(1 point)
Responses
A=2πr
upper A equals 2 pi r
A=πr2
upper A equals pi r squared
A=C2÷4πA=πd2
upper A equals upper C squared divided by 4 pi upper A equals pi d squared
A=πd
Responses
A=2πr
upper A equals 2 pi r
A=πr2
upper A equals pi r squared
A=C2÷4πA=πd2
upper A equals upper C squared divided by 4 pi upper A equals pi d squared
A=πd
The correct formula for finding the area of a circle is:
A = πr^2
Here, A represents the area and r represents the radius of the circle. This formula states that the area of a circle is equal to π (pi) multiplied by the square of the radius.
Therefore, the correct answer is A = πr^2.
A = πr^2
Here, A represents the area and r represents the radius of the circle. This formula states that the area of a circle is equal to π (pi) multiplied by the square of the radius.
Therefore, the correct answer is A = πr^2.