Which of the following can be used to find the area of a circle? A. $$ r \pi^{2} $$ B. $$ \pi d^{2} $$ C. $$ d \pi^{2} $$ D. $$ \pi r^{2} $$

Question

UpStudy AI · Accepted Answer

To find the area of a circle, we can use the formula:

$$
A = \pi r^{2}
$$

where $$ A $$ is the area and $$ r $$ is the radius of the circle.

Now, let's analyze the options provided:

A. $$ r \pi^{2} $$ - This is not the correct formula for the area of a circle.

B. $$ \pi d^{2} $$ - This is also not correct. The correct formula using diameter $$ d $$ is $$ \frac{\pi d^{2}}{4} $$.

C. $$ d \pi^{2} $$ - This is not the correct formula for the area of a circle.

D. $$ \pi r^{2} $$ - This is the correct formula for the area of a circle.

Thus, the correct answer is:

**D. $$ \pi r^{2} $$**.
The area of a circle is found using $$ \pi r^{2} $$.

Which of the following can be used to find the area of a circle? A. \( r \pi^{2} \) B. \( \pi d^{2} \) C. \( d \pi^{2} \) D. \( \pi r^{2} \)