Sea Symmetry
This is a level 2 geometry activity from the Figure It Out theme series.
A PDF of the student activity is included.
Click on the image to enlarge it. Click again to close. Download PDF (214 KB)
complete geometric patterns showing reflection
FIO, Level 2-3, Theme: Under the Sea, Sea Symmetry, page 4
Tracing paper
Activity One
In this activity, students complete shapes that have reflection symmetry. Students can complete the drawings in two ways:
• Use a mirror along the line of symmetry and draw the image that they see in the mirror.
• Draw one half of the shape, fold it along the line of symmetry, and trace the other half against a window, if necessary.
Key points about reflection are:
• Corresponding distances from the line of symmetry must be equal.
• Orientation is opposite.
Encourage students to make sea creatures with rotational symmetry (see page 16 of Geometry, level 2–3, in the Figure It Out series).
Answers to Activities
Activity One
Teacher to check
Activity Two
Answers will vary.