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西摩松(R.Simson,1687年-1768年)是英国数学家.以他的名字命名的西摩松定理即:过三角形外接圆上任意一点作三边的垂线,则三垂足共线.这条直线习惯地称为该三角形的关于外接圆上任意一点的西摩松线西摩松定理的推广较
Simon Seson (R.Simson, 1687-1768) was a British mathematician. The Seymourson theorem, named after him, was: When a point on a circumcircle of a triangle is a vertical line of three sides, the three legs Line. This line is customarily referred to as the promotion of the Seymourson’s theorem of the Seymourson line for any point on the circumscribed circle of the triangle.