Access Point #: MAFS.912.G-C.1.AP.1aArchived Access Point

Compare the ratio of diameter to circumference for several circles to establish all circles are similar.

Essential Understandings


  • Given two circles and a non-circle (oval, egg shape, etc.), identify the circles as similar.
  • Using two circles of different sizes, place one on top of the other (translations) to prove the circles are similar by stretching or shrinking (dilations).
  • Using a compass, protractor, or geometry software, create and compare similar circles of different sizes.
General Information
Number: MAFS.912.G-C.1.AP.1a
Category: Access Points
Date Adopted or Revised: 07/14
Cluster: Understand and apply theorems about circles. (Geometry - 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

This access point is an alternate version of the following benchmark(s).

Related Courses

This access point is part of these courses.
1200400: Foundational Skills in Mathematics 9-12
1206300: Informal Geometry
1206310: Geometry
1206320: Geometry Honors
7912060: Access Informal Geometry
1206315: Geometry for Credit Recovery
7912065: Access Geometry

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Element Cards

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Type: Element Cards

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