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Grade 4 - Shape and Space

Standard 4.SS.5 - Determine the symmetry of a two dimensional shape in relation to an axis of symmetry.

Included Skills:

Demonstrate an understanding of line symmetry by:
identifying symmetrical 2-D shapes
creating symmetrical 2-D shapes
drawing one or more lines of symmetry in a 2-D shape.

Achievement Indicators
Students who have achieved this outcome(s) should be able to:
- Identify the characteristics of given symmetrical and nonsymmetrical 2-D shapes.
- Sort a given set of 2-D shapes as symmetrical and nonsymmetrical and explain the process.
- Complete a symmetrical 2-D shape given half the shape and its line of symmetry and explain the process.
- Identify lines of symmetry of a given set of 2-D shapes and explain why each shape is symmetrical.
- Determine whether or not a given 2-D shape is symmetrical by using a Mira or by folding and superimposing.
- Create a symmetrical shape with and without manipulatives and explain the process.
- Provide examples of symmetrical shapes found in the environment and identify the line(s) of symmetry.
- Sort a given set of 2-D shapes as those that have no lines of symmetry, one line of symmetry or more than one line of symmetry.

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