Mathematics > Standard Multiple Choice

Read the following SAT test question and then click on a button to select your answer.

In the figure above, a shaded circle with diameter  is tangent to a large semicircle with diameter  at points  and . Point  is the center of the semicircle, and  is perpendicular to . If the area of the large semicircle is , what is the area of the shaded circle?     

答案请点击下一页>>>