Lines of symmetry 0 Overview Using this Resource Connecting to the Curriculum Marking Student Responses Working with Students Further Resources This task is about symmetry and rotational symmetry. Question Change answer a) i) Draw in all the lines of symmetry on the shape below. a) i) Draw in all the lines of symmetry on the shape below. Question 1Change answer ii) Through how many degrees can this shape be rotated until it first fits onto itself? ii) Through how many degrees can this shape be rotated until it first fits onto itself? ° Question Change answer b) i) Draw in all the lines of symmetry on the shape below. b) i) Draw in all the lines of symmetry on the shape below. Question 1Change answer ii) Through how many degrees can this shape be rotated until it first fits onto itself? ii) Through how many degrees can this shape be rotated until it first fits onto itself? ° Task administration: This task can be completed with pencil and paper or by drawing online. Copyright: Graphics: copyright NZCER Level: 4 Curriculum info: Maths, Geometry and Measurement, Transformation Keywords: symmetry, angle of rotation, line symmetry, rotational symmetry Description of task: Students identify axes of symmetry, and angles of rotation. Learning Progression FrameworksThis resource can provide evidence of learning associated with Geometric thinking, sets 4-5 within the Mathematics Learning Progressions Frameworks.Read more about the Learning Progressions Frameworks. Answers/responses: Y8 (06/1998) a) i) ii) 90 moderate difficult b) i) ii) 180 moderate moderate Diagnostic and formative information: Common error Likely calculation a) i) Only vertical and horizontal axes drawn. Fails to see all axes of symmetry. b) i) Includes 2 diagonal axes with vertical and horizontal. Includes extra axes of symmetry. a) ii) b) ii) 180°, 360° 360° Fails to see all rotational symmetry. b) ii) 90° Includes extraneous rotational symmetry. Star symmetry How many times? How much of a full turn? Finding the angle of rotation
