SME
Grade 4 Math · Problem type
Line symmetry
Use this for “How many lines of symmetry does the shape have?”
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How many lines of symmetry does it have?
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Assumptions
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A line of symmetry folds a shape onto itself: both halves match exactly.
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Some shapes have no line of symmetry, some have one, some have several.
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A square has 4 lines of symmetry. A circle has more than you can count.
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Lines, angles, shapes and symmetry
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Lines, angles, shapes and symmetry
Main lesson
Classify triangles and quadrilaterals
Use this to sort triangles and four-sided shapes by right angles and parallel sides.
Lines, line segments and rays
Use this for “Is it a line, a line segment or a ray?”
Classify angles
Use this for “Is the angle acute, right or obtuse?”