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这样,我们可将三角形的任意两边之和与第三边的关系完善为:三角形的任意两边之和大于第三边,而小于或等于第三边与该边所对的半角的正弦之比。
In this way, we can perfect the relationship between the sum of any two sides of the triangle and the third side: the sum of any two sides of the triangle is greater than the third side, and less than or equal to the ratio of the sine of the half angle of the third side to the side.