GRE
The area of the sector OAC
4$$\sqrt{2}$$π
The area of sector ABD with C at the center
The area of ACE
The length of arc ABC
The length of arc XYZ
The area of the shaded region
The area of the semi-circle OCB with OB as its diameter
The area of ΔAOB
The area of shaded part
The circumference of the large circle
The sum of the 5 circumferences of the smaller circle
∠DCA
45°
25000 +道题目
236本备考书籍