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How to Calculate a 30-60-90 Triangle | eHow
瀏覽：1323
日期：2025-05-09
A triangle with the angles of 30, 60 and 90 degrees is by definition a right triangle because one of the angles is 90 degrees--a right angle. Such triangles figure heavily in trigonometry instruction, so it is worthwhile to know both what the lengths of t...看更多
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