Problem
Student Help Video Show Example Complete: \( 10 \% \) Joshua Humphrey Circumference and Area of arCircle May 03, 5:47:18 PM Watch help video The area of a circle is \( 36 \pi \mathrm{cm}^{2} \). What is the circumference, in centimeters? Express your answer in terms of \( \pi \). \( \oplus \Theta \) Answer: \( C= \) \( \mathrm{cm} \) Submit Answer A attempt 1 out of 2
Solution
Step 1 ：\( A = 36\pi \mathrm{cm}^{2} \)
Step 2 ：\( A = \pi r^{2} \)
Step 3 ：\( r = \sqrt{\frac{36\pi}{\pi}} \)
Step 4 ：\( r = 6 \mathrm{cm} \)
Step 5 ：\( C = 2\pi r \)
Step 6 ：\( C = 12\pi \mathrm{cm} \)
