Which of the following groups contains three fractions that are equal? 1/2, 1/4, 1/8 1/2, 2/4, 5/8 2/3, 4/9, 8/27 2/3, 6/9, 12/18 4/5, 7/10, 16/20

Circle a has a diameter of 7 inches, a circumference of 21.98 inches, and an area of 38.465 square inches. the diameter of circle b is 6 inches, the circumference is 18.84 inches, and the area is 28.26 square inches. part a: using the formula for circumference, solve for the value of pi for each circle. (4 points) part b: use the formula for area and solve for the value of pi for each circle. (4 points)