Identifying Line Symmetry in Regular Polygons

This lesson teaches how to identify line symmetry in regular polygons by folding them into symmetrical parts. It covers the concept of line symmetry, explaining the three types: horizontal, vertical, and diagonal. The lesson provides examples using equilateral triangles, squares, and hexagons, showing how the number of lines of symmetry corresponds to the number of sides in these regular polygons.

What is a regular polygon?

• A polygon with all sides and angles equal

• A polygon with only equal angles

• A polygon with only equal sides

• A polygon with no equal sides or angles

Which of the following is NOT a type of line symmetry?

• Vertical

• Circular

• Horizontal

• Diagonal

How many lines of symmetry does an equilateral triangle have?

• Four

• One

• Two

• Three

Which line of symmetry does NOT exist in an equilateral triangle?

• Vertical

• Horizontal

• Diagonal

• None of the above

How many lines of symmetry does a square have?

• Four

• Five

• Three

• Two

What is the relationship between the number of sides and lines of symmetry in a regular polygon?

• The number of sides is always double the lines of symmetry

• The number of sides equals the number of lines of symmetry

• The number of sides is half the lines of symmetry

• There is no relationship

How many lines of symmetry does a regular hexagon have?

• Four

• Seven

• Six

• Five