2015年10月1日SAT官方每日一題

2015/10/08 瀏覽次數:2 收藏
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  標題範例:Mathematics > Standard Multiple Choice

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

  In the figure above, inscribed triangle ABC is equilateral. If the radius of the circle is r, then the length of arc AXB is

  謎底:A

  【剖析】