The study of geometric figures must be active, using visual images and concrete materials (tools such as graph paper, pattern blocks, geoboards, geometric solids, and computer software tools).
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Similar standards in other grades
Describe triangles, squares, and rectangles by the number of sides, vertices, and angles. (a)
An angle is formed by two rays that share a common endpoint called the vertex. Angles are found wherever lines or line segments intersect.
The student will a) Identify, trace, describe, and sort plane figures (triangles, squares, rectangles, and circles) according to number of sides, vertices, and angles; and b) identify and describe representations of circles, squares, rectangles, and triangles in different environments, regardless of orientation, and explain reasoning.
Trace a circle, triangle, square, and rectangle.
Compare and contrast characteristics of plane and solid geometric figures (e.g., circle/sphere, square/cube, triangle/square pyramid, and rectangle/rectangular prism), by counting the number of sides, angles, vertices, edges, and the number and shape of faces.