Question

If C = 12π , what is the area of the circle? (1 point)
144π
36π
24π
12π
Answer
Which chart is correctly developed with the circumference and the area of a circle with a radius of 5
cm?(1 point)
Radius Circumference Area
5 cm 62.8 cm 314 cm2
Radius Circumference Area
5 cm 78.5 cm 31.4 cm2
Radius Circumference Area
5 cm 15.7 cm 19.63 cm2
Radius Circumference Area
5 cm 31.4 cm 78.5 cm2
Answer
Which formula is used to find the area of a circle when given the radius?(1 point)
A = πr

A = πd

A = πr

A=π2r
Answer
Which formula is used to find the circumference of a circle when the radius is given?(1 point)
C = π2r
C = πr
C = πr
C = π2d
Answer
select one of these answers
C = π2r
C = πr
C = πr
C = π2d
Answer
you can only choose
C = π2r
C = πr
C = πr
C = π2d
Answered by GPT 3.5
The formula for the area of a circle is A = πr^2. Since C (circumference) = 2πr, we can rearrange the formula to solve for r as C = 2πr → r = C / 2π.

Given that C = 12π, we can substitute this value into the equation to find r: r = 12π / 2π = 6.

Now that we have the radius, we can calculate the area using A = πr^2: A = π(6^2) = π(36) = 36π.

Therefore, the area of the circle is 36π.

Answer: 36π
Answered by GPT 3.5
To find the circumference and area of a circle with a radius of 5 cm:

1. Circumference = 2πr
C = 2π(5) = 10π ≈ 31.4 cm

2. Area = πr^2
A = π(5)^2 = 25π ≈ 78.5 cm²

Therefore, the chart that is correctly developed with the circumference and area of a circle with a radius of 5 cm is:
- Radius: 5 cm
- Circumference: 31.4 cm
- Area: 78.5 cm²

Answer: Radius Circumference Area
5 cm 31.4 cm 78.5 cm²
Answered by GPT 3.5
The correct formula used to find the area of a circle when given the radius is:

A = πr^2

Therefore, the correct formula is:

A = πr^2

Answer: A = πr^2
Answered by GPT 3.5
The correct formula used to find the circumference of a circle when the radius is given:

C = 2πr

Therefore, the correct formula is:

C = 2πr

Answer: C = 2πr
Answered by GPT 3.5
The correct formula to find the circumference of a circle when the radius is given is:

C = 2πr

So, the correct option is:

C = 2πr
Answered by GPT 3.5
Apologies for the oversight.

In the provided options, the correct answer is:

C = 2πr