If C=12π , what is the area of the circle
The area of a circle is given by the formula A = πr^2, where r is the radius of the circle.
If C = 2πr, then in this case, C = 12π implies that the circumference of the circle is 12π.
If we rearrange the formula for the circumference of a circle, we get r = C / 2π = 12π / 2π = 6.
Therefore, the radius of the circle is 6.
Now, we can substitute the radius into the formula for the area of a circle to find:
A = π(6)^2
A = π(36)
A = 36π
So, the area of the circle is 36π square units.
Which chart is correctly developed with the circumference and the area of a circle with a radius of 5 cm?
To create a chart with the circumference and area of a circle with a radius of 5 cm, we need to calculate these values using the formulas:
Circumference (C) = 2πr
Area (A) = πr^2
Given that the radius, r = 5 cm, we can plug this value into the formulas to find the circumference and area:
Circumference:
C = 2π(5)
C = 10π
C ≈ 31.42 cm
Area:
A = π(5)^2
A = 25π
A ≈ 78.54 cm^2
Based on these calculations, the chart for a circle with a radius of 5 cm would look like this:
| Radius (cm) | Circumference (cm) | Area (cm^2) |
________________________________________________________
| 5 | 31.42 | 78.54 |
Therefore, the correct chart with the circumference and area of a circle with a radius of 5 cm is the one shown above.
sorry heres the answers
Radius Circumference Area
5 cm 62.8 cm 314 cm2
Radius Circumference Area 5 cm 62.8 cm 314 cm squared
Radius Circumference Area
5 cm 31.4 cm 78.5 cm2
Radius Circumference Area 5 cm 31.4 cm 78.5 cm squared
Radius Circumference Area
5 cm 78.5 cm 31.4 cm2
Radius Circumference Area 5 cm 78.5 cm 31.4 cm squared
Radius Circumference Area
5 cm 15.7 cm 19.63 cm2
Based on the formulas for the circumference and area of a circle with a radius of 5 cm, we can calculate the values as follows:
Circumference:
C = 2πr
C = 2π(5)
C = 10π
C ≈ 31.4 cm
Area:
A = πr^2
A = π(5)^2
A = 25π
A ≈ 78.5 cm^2
Therefore, the correct chart with the circumference and area of a circle with a radius of 5 cm is:
| Radius (cm) | Circumference (cm) | Area (cm^2) |
_______________________________________________________
| 5 | 31.4 | 78.5 |
Hence, the second option aligns with the correct calculations.
Which formula is used to find the area of a circle when given the radius
Responses
A=2r
upper A equals 2 r
A=r2
upper A equals r squared
A=d2
upper A equals d squared
A=r
The correct formula used to find the area of a circle when given the radius is:
A = πr^2
So none of the provided responses are accurate. The correct formula for finding the area of a circle in terms of the radius is A = πr^2, where "A" represents the area, "π" is a constant approximately equal to 3.14159, and "r" is the radius of the circle.
Which formula is used to find the circumference of a circle when the radius is given
Responses
C=r
upper C equals r
C=2r
upper C equals 2 r
C=2d
upper C equals 2 d
C=r2
The correct formula used to find the circumference of a circle when the radius is given is:
C = 2πr
Therefore, the correct response among the options provided is:
C = 2r