The 2 dashes tell us the 2 side lengths are the same, The 3 dashes tell us each side is the same length, This is a quadrilateral, Adjacent angles on a straight line sum to 180, Vertically opposite angles are equal, Angles around a point sum to 360, Angles in a triangle sum to 180,

Geometry notations and angle facts

打印
嵌入

排行榜

视觉风格

选项

切换模板

恢复自动保存：？