Symmetry Identify Line

Symmetry Identify Line practice with teacher guidance, common slips, and next-step routes.

Core · Symmetry Identify Line · Independent practice · Scalar Entry

Seven symbols are built from square tiles, each with a vertical mirror line. A symbol passes if reflection leaves its filled-square pattern unchanged. How many symbols pass?

Count whole symbols unchanged by a left–right reflection.

Symbol 1

Symbol 2

Symbol 3

Symbol 4

Symbol 5

Symbol 6

Symbol 7

Your Value

Your Value

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Print: Ages 8–9 · 3–4 min · Core · Reflection Symmetry · Independent practice · Value Entry

Watch: Watch whether the learner checks all three left–right cell pairs in every row, including empty squares. A correct count is decisive only when the same fixed vertical line is used for all seven symbols.

Misread: A likely misread is counting filled squares or treating a half-turn or top–bottom match as the action. The answer is one count of whole symbols that stay unchanged across the shown vertical line.

Curriculum: This task develops line-reflection symmetry as invariance under a specified axis and scores the cardinality of the invariant subset. Learners compare corresponding positions and count the qualifying two-dimensional patterns.