Access Point #: MAFS.4.G.1.AP.2a (Archived Access Point)

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Identify and sort objects based on parallelism, perpendicularity, and angle type.


Essential Understandings


  • Identify attributes within a two-dimensional figure (i.e., sides and angles).
  • Sort manipulatives into categories:
  • Parallel sides
  • Perpendicular sides
  • Types of angles
  • Identify parallel and perpendicular lines.
  • Recognize and identify acute, obtuse, and right angles.
  • Understand the following concepts and vocabulary: parallel, perpendicular, right angle, obtuse angle, and acute angle.

Number: MAFS.4.G.1.AP.2a Category: Access Points
Date Adopted or Revised: 06/14 Cluster: Draw and identify lines and angles, and classify shapes by properties of their lines and angles. (Additional Cluster)

Clusters should not be sorted from Major to Supporting and then taught in that order. To do so would strip the coherence of the mathematical ideas and miss the opportunity to enhance the major work of the grade with the supporting clusters.

Related Standards

Name Description
MAFS.4.G.1.2: Classify two-dimensional figures based on the presence or absence of parallel or perpendicular lines, or the presence or absence of angles of a specified size. Recognize right triangles as a category, and identify right triangles.

Related Courses

Name Description
5012060: Mathematics - Grade Four
7712050: Access Mathematics Grade 4
5020110: STEM Lab Grade 4
5012055: Grade 3 Accelerated Mathematics
5012015: Foundational Skills in Mathematics 3-5

Related Resources

Element Cards

Name Description
4th Grade Math Element Cards:

Element Cards are available to assist in planning for instruction. They are designed to promote understanding of how students move toward the academic standards. Element Cards contain one or more access points, essential understandings, suggested instructional strategies and suggested supports.

Teaching Idea

Name Description
Curriculum Resource Guide: Measurement and Geometry:

Complete Unit