9: Part A The diameter of a circle is 63 centimeters. Find its circumference. Use π=3.14. A 31.5 centimeters B 98.91 centime
ters C 197.82 centimeters D 3,115.67 centimeters Part B Find the area of the circle. ( use π=3.14 ) Round your answer to the nearest hundredth. Answer: square centimeters.
Part A: The circumference of the circle is 197.92.
Explanation: The formula for circumference of a circle is C=2 πr. If you insert the numbers, it would be C=2 x 3.14 x 31.5. Hence, the answer is 197.92.
Part B: The area is 3117.25 square cm.
Explanation: The formula for area of a circle is A= πr ². Inserting the numbers, it is A=3.14 x 31.5 ². Therefore the answer is 3117.25 cm ².
