Shape Identifier

Sub Trajectory: classifying

Names most common shapes, including rhombuses, without making mistakes such as calling ovals "circles." Recognizes (at least) right angles, so distinguishes between a rectangle and a parallelogram without right angles.


You may see this:

Linked Image to Sign In/Sign Up page

Other Examples:

  • When shown a group of shapes, a child names common shapes such as squares and rectangles, as well as less common shapes such as trapezoids.
  • A child notices that a shape cannot be a rectangle because “it’s corners aren’t right.” 

Help your student become a(n) Shape Identifier

Explorations and discussions involve more than the shapes typically named in our culture, such as many different shapes of hexagons (any polygon with 6 sides), rhombuses (four equal sides; includes squares), and trapezoids (1 pair of parallel sides),  pentagons with 5 sides, octagons with 8, quadrilaterals or all 4-sided shapes, parallelograms (two pairs of parallel sides (includes rectangles, rhombuses, and squares) and so forth.

Special Thanks To

Institute of Education Sciences
The research reported here was supported by the Institute of Education Sciences, U.S. Department of Education, through grant numbers R305K050157, R305A120813, R305A110188, and R305A150243. to the University of Denver. The opinions expressed are those of the authors and do not represent views of the Institute or the U.S. Department of Education.