GRE
The area of the shaded region
π
The radius of circle C
6
The circumference of a circle with a diameter of 6
The circumference of a circle with a radius of 12
Four times the area of a circular region with a circumference of 4π
The circumference of a circular region with an area of 64π
The ratio of the circumference of C to the radius of C
Half the diameter of C
Length of line segment AB
Length of line segment CD
25000 +道题目
6本备考书籍