🦋 Lines of Symmetry 📚 Grade 3-4 ⏱ 6 min
How Many Lines of Symmetry Does a Shape Have?
Some shapes have more than one line of symmetry. Here is how to find all of them in familiar shapes.
One line — for some shapes
An isosceles triangle has only one line of symmetry — a vertical line through its top vertex.
💡 Practice: cut a shape from paper and fold it different ways — every fold that matches perfectly is a line of symmetry.
Multiple lines — for very symmetric shapes
A square has 4 lines of symmetry: 2 through the midpoints of sides, 2 along the diagonals. A circle has infinitely many — any line through the center works.
FAQ
Does every shape have a line of symmetry?
No, irregular shapes (like the letter F) may have no lines of symmetry at all.