Question

Senthia wants to build a round photo frame for her brother. If the radius of the photo frame is 8 cm, what is the photo frame’s circumference?(1 point)

Answer 1

To find the circumference of a round photo frame (which is the same as the circumference of a circle), you can use the formula:

\[ C = 2 \pi r \]

where \( C \) is the circumference and \( r \) is the radius of the circle.

Given that the radius (\( r \)) is 8 cm, the calculation would be:

\[ C = 2 \pi \times 8 \]
\[ C = 16 \pi \]

If you use the approximate value of \( \pi \) (which is roughly 3.14159), the circumference would be:

\[ C \approx 16 \times 3.14159 \]
\[ C \approx 50.27 \, \text{cm} \]

Therefore, the circumference of the photo frame is approximately 50.27 cm.