China Naming Network - Company naming - As shown in the figure, O 1A=O2A=3cm, O 1C=O2D=2cm, the quadrilateral O 1AO2B is a square, and pi = 3. 14, then the area of Figure 8 (shaded part) is (
As shown in the figure, O 1A=O2A=3cm, O 1C=O2D=2cm, the quadrilateral O 1AO2B is a square, and pi = 3. 14, then the area of Figure 8 (shaded part) is (
S shadow = 2× 34× (3.14× 32-3.14× 23),
=32×3. 14×(9-8),
=23.55(cm2)。
So choose D.