names of angles
Name EN | Name DE | Description |
---|---|---|
acute angle | spitzer Winkel | $${0 < \alpha < 90°}$$ |
right angle | rechter Winkel | $${90°}$$ |
obtuse angle | stumpfer Winkel | $${90° < \alpha < 180°}$$ |
straight angle | gerader Winkel | $${180°}$$ |
reflex angle | überstumpfer Winkel | $${180° < \alpha < 360°}$$ |
full turn | Vollwinkel | $${360°}$$ |
supplementary angles - Nebenwinkel (Ergänzungswinkel)
two angles on a line add up to 180°
complementary angles
These are angles that add up to 90°
vertically opposite angles - Scheitelwinkel
vertically opposite angles are equal
angles on parallel lines cut by a transversal
alternate interior angles - Wechselwinkel (Z-Winkel)
the alternate interior angles are equal
corresponding angles - Stufenwinkel (F-Winkel)
correponding angles
interior (exterior) angles on the same transversal - Nachbarwinkel (E- Winkel)
interior angles on the same transversal add up to 180°