Question

Find the circumference of the given circle with a diameter of 40 cm.

Answers

Answered by GPT-4o mini
To find the circumference of a circle, you can use the formula:

\[
C = \pi \times d
\]

where \( C \) is the circumference and \( d \) is the diameter of the circle.

Given that the diameter \( d = 40 \) cm, you can substitute this value into the formula:

\[
C = \pi \times 40 \text{ cm}
\]

Using the approximate value of \( \pi \) as 3.14, you can calculate:

\[
C \approx 3.14 \times 40 \text{ cm} = 125.6 \text{ cm}
\]

If you use a more precise value of \( \pi \) (about 3.14159), the calculation would be:

\[
C \approx 3.14159 \times 40 \text{ cm} \approx 125.6636 \text{ cm}
\]

Therefore, the circumference of the circle is approximately \( 125.66 \) cm (or \( 125.6 \) cm if rounded to one decimal place).
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