Ohio Mathematics Academic Content Standards (2001) Geometry and
Spatial Sense Standard Sort and compare two-dimensional figures
and three-dimensional objects according to their characteristics
and properties. Provide rationale for groupings and comparisons
of two-dimensional figures and three-dimensional objects. Use
attributes to describe, classify and sketch plane figures and
build solid objects. Grade Level Indicators (Grade 1) Identify,
compare, and sort two-dimensional shapes; i.e., square, circle,
ellipse, triangle, rectangle, rhombus, trapezoid, parallelogram,
pentagon, and hexagon. For example: a. Recognize and identify
triangles and rhombuses independent of position, shape or size;
and b. Describe two-dimensional shapes using attributes such as
number of sides and number of vertices (corners, or angles).
Grade Level Indicators (Grade 3) Analyze and describe properties
of two-dimensional shapes and three-dimensional objects using
terms such as vertex, edge, angle, side and face. Grade Level
Indicators