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Standard #: MA.912.G.2.1 (Archived
Standard)
This document was generated on CPALMS - www.cpalms.org
Identify and describe convex, concave, regular, and irregular polygons.
Subject Area: X-Mathematics (former standards - 2008)
Grade: 912
Body of Knowledge: Geometry
Standard: Polygons - Identify and describe polygons (triangles, quadrilaterals, pentagons,
hexagons, etc.), using terms such as regular, convex, and concave. Find measures of angles,
sides, perimeters, and areas of polygons, justifying the methods used. Apply transformations to
polygons. Relate geometry to algebra by using coordinate geometry to determine
transformations. Use algebraic reasoning to determine congruence, similarity, and symmetry.
Create and verify tessellations of the plane using polygons.
Date Adopted or Revised: 09/07
Content Complexity Rating: Level 3: Strategic Thinking & Complex Reasoning - More
Information
Date of Last Rating: 06/07
Status: State Board Approved - Archived
Assessed: Yes
Remarks/Examples
Example 1: Draw a hexagon. Is it convex or concave? Is it regular or irregular? Explain your answers.
Example 2: Define the terms convex, concave, regular and irregular polygon and draw a picture of the tern next to the
definition.
Related Access Points
Independent
Access Point Number
Access Point Title
Determine if polygons have all sides and angles equal (regular)
or have sides or angles that are not equal (irregular) using
physical and visual models.
MA.912.G.2.In.a
Supported
Access Point Number
Access Point Title
Identify polygons with all sides and angles equal (regular) in the
environment.
MA.912.G.2.Su.a
Participatory
Access Point Number
MA.912.G.2.Pa.a
Access Point Title
Identify objects or pictures with polygons.
Related Resources
Image/Photograph
Name
Clipart: Geometric Shapes
Description
In this lesson, you will find clip art and various illustrations of
polygons, circles, ellipses, star polygons, and inscribed shapes.
Parent Resources
Name
Clipart: Geometric
Shapes
Description
In this lesson, you will find clip art and various illustrations of
polygons, circles, ellipses, star polygons, and inscribed shapes.