4.G.3

In this standard, students are expected to identify lines of symmetry.

Lines of symmetry can be vertical, horizontal, and/or diagonal.

Hint: A regular polygon (all sides equal) will have the same number of lines of symmetry as it does number of sides.

Example:

• An equilateral triangle has 3 sides and 3 lines of symmetry
• A square has 4 sides and 4 lines of symmetry

Non-example:

• A rectangle has 4 sides, but they are not all the same size. It only has 2 lines of symmetry.