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文 [1]建立了三角形的外周界中点及外周界中点三角形的概念 :若将三角形的一条边延长 ,使其延长部分等于另两边之和 ,那么就称这条边与其延长部分构成的线段的中点为三角形的外周界中点 .并以逆时针绕行方向延长三角形各边所得的外周界中点为顶点构成的三角形称为正向外周界中?
The paper [1] establishes the concept of a triangular midpoint of the outer perimeter and a midpoint of the outer perimeter: if one side of the triangle is extended so that the extension is equal to the sum of the other two sides, then the side and its extension are called The middle point of the line segment is the midpoint of the outer perimeter of the triangle, and the triangle formed by extending the midpoint of the outer perimeter of the triangle in a counterclockwise direction to make the vertex point is called the positive outer perimeter?