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抛物线的弦与弦的端点处的两条切线所围成的三角形被称作阿基米德三角形.阿基米德最早利用逼近的思想证明了有关性质:抛物线的弦与抛物线所围成的封闭图形的面
The triangle formed by two tangents at the ends of the parabolic chords and chords is called the Archimedean triangle. Archimedes, at first, proved the relevant property by the idea of approximation: the closed loop formed by the parabolic chord and the parabola Graphic surface