- p. 12Is It a Line of Symmetry?. Fold each shape on the dashed line in your mind, then circle yes or no.
- p. 13Draw Lines of Symmetry. Draw every line of symmetry, then write how many lines you drew.
- p. 14Mixed Review. Read each problem, then solve.
The standard
Identify lines of symmetry in polygons.
Element 3.GSR.6.3 of Georgia's K-12 Mathematics Standards (2021, effective SY2023-24), in the Geometric & Spatial Reasoning strand. It sits under standard 3.GSR.6: Identify the attributes of polygons, including parallel segments, perpendicular segments, right angles, and symmetry.
What students practice
Students fold a shape in their mind along a dashed line and decide whether it is a line of symmetry, then draw every line of symmetry and count them. Shapes sit on dots so a fold can be checked by counting, and they have 0, 1, 2, or 4 lines.
Where to find it
Think: fold on the line, and if the 2 halves match, it is a line of symmetry.