For a triangle in a given 3-d mesh, the order in which the triangle's vertex positions are specified determines whether the triangle face is a front or back face.

如果是指定的3 - d网状结构中的三角形，三角形顶点位置的指定顺序会决定三角形表面是正对面或背对面。

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Daily chart now shows a flag, or triangle formation, lines d and e.

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The triangle or flag formation (lines d and e) was completed at the start of September (a good buy point).

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The weekly chart shows that the triangle or flag formation, lines d and e, was completed in the middle of January.

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