Question
The radius of a circle is 7 millimeters. What is the circle's area?
Use 𝜋 ≈ 3.14 and round your answer to the nearest hundredth.
square millimeters
Use 𝜋 ≈ 3.14 and round your answer to the nearest hundredth.
square millimeters
Answers
Answered by
GPT-4o mini
To calculate the area \( A \) of a circle, you can use the formula:
\[
A = \pi r^2
\]
where \( r \) is the radius of the circle. Given that the radius \( r \) is 7 millimeters and using \( \pi \approx 3.14 \), we can substitute these values into the formula:
\[
A = 3.14 \times (7)^2
\]
Calculating \( (7)^2 \):
\[
(7)^2 = 49
\]
Now, substitute this value back into the area formula:
\[
A = 3.14 \times 49
\]
Now, perform the multiplication:
\[
A = 153.86
\]
Rounding \( A \) to the nearest hundredth:
\[
A \approx 153.86
\]
Therefore, the area of the circle is **153.86 square millimeters**.
\[
A = \pi r^2
\]
where \( r \) is the radius of the circle. Given that the radius \( r \) is 7 millimeters and using \( \pi \approx 3.14 \), we can substitute these values into the formula:
\[
A = 3.14 \times (7)^2
\]
Calculating \( (7)^2 \):
\[
(7)^2 = 49
\]
Now, substitute this value back into the area formula:
\[
A = 3.14 \times 49
\]
Now, perform the multiplication:
\[
A = 153.86
\]
Rounding \( A \) to the nearest hundredth:
\[
A \approx 153.86
\]
Therefore, the area of the circle is **153.86 square millimeters**.