【基礎級練習題91】
1. <a 之角度值為何?<br/> (A) 51.117° (B) 51.171° (C) 51.711°<br/>2. 剖面線區域之面積為何?<br/> (A) 202.2687 (B) 202.2768 (C) 202.2867 <p>【基础级练习题91】答案:<br/>1. ∠a 之角度值 = 51.711°,就是(C)<br/>2. 剖面线区域之面积 = 202.2867,就是(C)</p><p>本题的动画解题已经发表,见:</p><p><a href="http://bbs.mjtd.com/forum.php?mod=viewthread&tid=55192&extra=&page=10">http://bbs.mjtd.com/forum.php?mod=viewthread&tid=55192&extra=&page=10</a></p>
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