2D-Rotation

Lernen

Eine Form mental um einen bestimmten Winkel in der Ebene drehen.

2D rotation involves mentally turning a shape around its center by a specified number of degrees. Clockwise rotation moves the shape in the same direction as clock hands; counterclockwise is the opposite. Common rotation angles are 90° (quarter turn), 180° (half turn), and 270° (three-quarter turn). The key skill is tracking how specific features of the shape move during rotation.

new_position = rotate(original_position, angle, center)

• 90° clockwise: top moves to right, right moves to bottom
• 180°: shape is upside-down, left-right reversed
• 270° clockwise = 90° counterclockwise

So erkennen Sie es

• Pick a distinctive feature (corner, point, asymmetric part)
• Track where that feature moves during rotation
• 90° moves each side one position clockwise
• Verify multiple features match the expected rotation

Häufige Fehler

• Confusing clockwise with counterclockwise
• Losing track of the original orientation
• Not considering that 270° CW = 90° CCW

Übungshinweise

Räumliches Denken