Yellow
Green
Blue
Red
Magenta
Remove
Each fold in the paper shows a line of symmetry. When folded on a line of symmetry, the parts of the shape match exactly.
- Look for other lines of symmetry. How many lines of symmetry are in Professor Peabody's snowflake?
Cut out the shapes on the Line Symmetry of Power Polygons™ page in the Student Activity Book. Use the following questions to explore lines of symmetry.
- How many lines of symmetry are in a square? Fold Polygon A.
- How many lines of symmetry are in a regular triangle? Fold Polygon I.
- How many lines of symmetry are in a rhombus? Fold Polygon G.
- Find the lines of symmetry for the other Power Polygons™.
- Sort the Polygons A–O into groups by the number of lines of symmetry. Tape the shapes to a sheet of paper. Label each group.
- Look at the polygons grouped by lines of symmetry.
- Do all triangles have lines of symmetry?
- Describe the triangles that have three lines of symmetry.
- Describe the shapes that have one line of symmetry.
- Polygon C, the blue rectangle, has two lines of symmetry. Do you think all rectangles have at least two lines of symmetry? Why or why not?