If C=12π, what is the area of the circle? (1 point)
Responses
24π
24 pi
36π
36 pi
12π
12 pi
144π
2.
The Relationship Between Circumference & Area Quick Check
3 of 53 of 5 Items
Question
Which chart is correctly developed with the circumference and the area of a circle with a radius of 5 cm?(1 point)
Responses
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 31.4 cm 78.5 cm2
Radius Circumference Area 5 cm 31.4 cm 78.5 cm squared
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 15.7 cm 19.63 cm2
3.Which formula is used to find the area of a circle when given the radius?(1 point)
Responses
A=πr
upper A equals r
A=πd2
upper A equals d squared
A=π2r
upper A equals 2 r
A=πr2
4.Which formula is used to find the circumference of a circle when the radius is given?(1 point)
Responses
C=πr2
upper C equals r squared
C=π2d
upper C equals 2 d
C=πr
upper C equals r
C=π2r
C=12π, so the radius, r, can be calculated by dividing the circumference by 2π.
C=2πr
12π=2πr
r=6
The area of the circle can be calculated using the formula A=πr^2.
A=π(6)^2
A=π(36)
A=36π
Therefore, the area of the circle is 36π.
For question 3, the correct chart is:
Radius Circumference Area
5 cm 31.4 cm 78.5 cm squared
The formula used to find the area of a circle when given the radius is:
A=πr^2
The formula used to find the circumference of a circle when the radius is given is:
C=2πr
what's the answer 1 2 3 and 4
1. The area of the circle when C=12π is 36π. So, the answer is 36π.
2. The correct chart for a circle with a radius of 5 cm is:
Radius Circumference Area
5 cm 31.4 cm 78.5 cm squared
So, the answer is "Radius Circumference Area 5 cm 31.4 cm 78.5 cm squared".
3. The formula used to find the area of a circle when given the radius is A=πr^2. So, the answer is A=πr^2.
4. The formula used to find the circumference of a circle when the radius is given is C=2πr. So, the answer is C=2πr.