Point symmetry — find the centre
Point symmetry — find the centre
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Pick the coordinates of the centre of symmetry S.
A = (-2, -1) · A' = (4, 3)
Pick S = the centre of point symmetry for A → A′:
What does this generator do?
The generator places a pair of symmetric points A and A′. Pick the centre of symmetry from four options.
How to solve it
The centre of symmetry S is the **midpoint** of segment AA′. Formula: S = (A + A′) / 2. Compute the half-sums: x_S = (x_A + x_{A′}) / 2, similarly for y.
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