11.3 (Part 2) Symmetries

Line Symmetry

→ a figure has line symmetry when it is its own image under a reflection in line l.

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Figure

How many lines of symmetry does each one have?

Turn Symmetry (aka Rotational Symmetry)

→ a figure has turn symmetry when the traced figure can be rotated less than 360° about some point so that it matches the original figure.

Figure

Figure

Figure

Point Symmetry

→ a figure that has 180° turn symmetry also has point symmetry.

Figure