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

Výsledková tabule/Žebříček

Vizuální styl

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