Abstract

Symmetry: Culture and Science
Volume 34, Number 3, pages 217-229 (2023)
https://doi.org/10.26830/symmetry_2023_3_217

SYMMETRY FOR CHILDREN USING DRAWING BOARD TOOLS AND TANGRAMS

Joan A. Cotter

Activities for Learning, Inc., 321 Hill Street, Hazelton, North Dakota 58544, U.S.A.
Email: joancotter@rightstartmath.com
Web: http://rightstartmathclassroom.com

Abstract: Young children are unable to use Euclid’s tools for geometric constructions. However, children as young as 5 years can construct equilateral triangles, hexagons, squares, and other geometric figures using scaled-down traditional drafting tools: T-square, 30-60 triangle, and 45 triangle. Older children can draw lines of symmetry and construct figures about a line of symmetry both vertically and horizontally using tangram pieces. Through this work, children will appreciate geometry and experience the beauty of mathematics.

Keywords: Symmetry, Constructing geometric figures, Drawing board tools, Tangrams

References:
Bornstein, M. H., and Stiles-Davis, J. (1984) Discrimination and memory for symmetry in young children, Developmental Psychology, 20, 4, 637-649; https://doi.org/10.1037/0012-1649.20.4.637.

Cotter, J. A. with Mittleider, T. M. (2014) RightStart Mathematics: Second Grade Lessons, 2nd ed., Hazelton, North Dakota: Activities for Learning, Inc., 120-237.

Jones, K. (2000) Critical Issues in the Design of the Geometry Curriculum, In: Barton, B., ed. Readings in Mathematics Education, Auckland, New Zealand: University of Auckland, 75-90.

Lindquist, M. M. and Shulte, A. P. (1987) Learning and Teaching Geometry, K-1: 1987 Yearbook,Reston, Virginia: National Council of Teachers of Mathematics, 250 pp.