Symmetry and Lines of Symmetry Flashcards

Grade 4 · Math · Flashcards

Study lines of symmetry for common shapes and letters.

Flashcards

Line of symmetry: A line that divides a shape into two identical mirror-image halves.
Symmetry: A shape has symmetry if one half is a mirror image of the other half.
Square: lines of symmetry?: 4 lines
Rectangle (non-square): lines of symmetry?: 2 lines
Equilateral triangle: lines of symmetry?: 3 lines
Isosceles triangle: lines of symmetry?: 1 line
Scalene triangle: lines of symmetry?: 0 lines
Circle: lines of symmetry?: Infinite — every diameter is a line of symmetry.
Regular hexagon: lines of symmetry?: 6 lines
Letter A: symmetry?: Yes — 1 vertical line of symmetry.
Letter H: symmetry?: Yes — 2 lines (horizontal and vertical).
Letter F: symmetry?: No — F has no line of symmetry.
Reflection: A mirror image of a shape flipped across a line of symmetry.