Content Area: Math

 

Index: 4.2A Grade 3 CPI 3

 

Standard: 4.2 - Geometry and Measurement

 

Strand: A - Geometric Properties

 

Cumulative Progress Indicator: 3 -  The student will identify and describe relationships among two-dimensional shapes.

·        Same size, same shape

·        Lines of symmetry

 

Grade: 3

 

Sample Activities:

 

·        Students look for examples of congruent figures (same size and shape) in the environment.

 

·        Students explore symmetry by using mirrors with pattern blocks or by folding paper or by making inkblot designs. Students find the lines of symmetry in the letters of the alphabet and in numerals. They fold paper and cut out symmetric designs. They identify the symmetry in wallpaper or giftwrap designs.

 

·        Students use different size dolls and action figures as an introduction to the concept of similarity (same shape, different size).

 

Sample Assessment Questions:

 

·        Multiple Choice: Geometric properties