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The 30°-60°-90° triangle. Topics in trigonometry.
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日期：2025-12-10
The ratios of the sides in a 30-60-90 triangle. How to solve a 30-60-90 triangle. ... Problem 10. Prove: The angle bisectors of an equilateral triangle meet at a point that is two thirds of the distance from the vertex of the triangle to the base....看更多
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