Respuesta :
The second statement is correct, the one with the circumference formula.
The first one , the one about the area of the circle, is wrong. The formula should actually look like this: [tex]A = \pi r^2[/tex]. It is the radius squared, not the radius times 2.
The first one , the one about the area of the circle, is wrong. The formula should actually look like this: [tex]A = \pi r^2[/tex]. It is the radius squared, not the radius times 2.
Answer:
The formula for the circumference, C, of a circle is C = πd , where d is the circle’s diameter.
Step-by-step explanation:
For a circulus with radius r, we have that:
The area of the circulus is:
[tex]A = \pi r^{2}[/tex]
That is, the radius is squared, not multiplied by 2, so the first statement is incorrect.
The circumference of the circulus is:
The derivative of the area, so
[tex]C = 2\pi r[/tex]
However
The radius if half the diameter. So
[tex]C = 2\pi \frac{d}{2}[/tex]
[tex]C = \pi d[/tex]
So the correct statement is:
The formula for the circumference, C, of a circle is C = πd , where d is the circle’s diameter.
