Question

What is the circumference of the circle? Use 3.14 for π.

circle with a segment drawn from the center of the circle to a point on the circle labeled 3 inches

9.42 inches
18.84 inches
28.26 inches
88.74 inches
Question 7(Multiple Choice Worth 2 points)
(Circumference LC)

What is the circumference of a circle with a radius of 21 feet? Use 22 over 7 for π.

132 feet
66 feet
5,544 feet
1,386 feet

Answer 1

For the first question, we can use the fact that the circumference of a circle can be calculated using the formula:

C = 2πr

where C is the circumference of the circle and r is the radius of the circle. Since we are given the length of the segment drawn from the center of the circle to a point on the circle, which is equal to the radius of the circle, we can use the value of r as 3 inches. So, the circumference of the circle is:

C = 2πr = 2 × 3.14 × 3 inches ≈ 18.84 inches

Therefore, the answer is B. 18.84 inches.

For the second question, we can use the same formula:

C = 2πr

where C is the circumference of the circle and r is the radius of the circle. Since we are given the radius of the circle as 21 feet and we are asked to use 22/7 for π, we can substitute the values in the formula and calculate the circumference:

C = 2πr = 2 × 22/7 × 21 feet ≈ 132 feet

Therefore, the answer is A. 132 feet.