Transformations.

Beschreibung

Rotations, dilations, reflections.
Tahirintsoa Naharivelo
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Tahirintsoa Naharivelo
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Zusammenfassung der Ressource

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-90° clockwise rotation (x,y) → (y,-x) clockwise = -x
90° counterclockwise rotation (x,y) → (-y,x) counterclockwise = -y
180° clockwise or counterclockwise (x,y) → (-x,-y) switch the signs, make negative
270° counterclockwise (x,y) → (y,-x) 270° = -90°
-270° clockwise (x,y) → (-y,x) -270° = 90°
x-axis reflection (a,b) → (a,-b)
y-axis reflection (a, b) → (-a, b)
origin reflection (a, b) → (-a, -b)
line y = x reflection (a, b) → (b, a)
line y = -x reflection (a, b) → (-b, -a)
line x = a (x, y) → (2a - x, y)
writing dilation transformation (x, y) → (ax, ay)
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