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MAFS.8.G.1.4

Understand that a two-dimensional figure is similar to another if the second can be obtained from the first by a sequence of rotations, reflections, translations, and dilations; given two similar two-dimensional figures, describe a sequence that exhibits the similarity between them.
Subject Area: Mathematics
Grade: 8
Domain-Subdomain: Geometry
Cluster: Level 2: Basic Application of Skills & Concepts
Cluster: Understand congruence and similarity using physical models, transparencies, or geometry software. (Major 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.

Date Adopted or Revised: 02/14
Date of Last Rating: 02/14
Status: State Board Approved
Assessed: Yes

TEST ITEM SPECIFICATIONS

  • Item Type(s): This benchmark may be assessed using: MC item(s)
  • Also Assessed:

    MAFS.8.G.1.1 Verify experimentally the properties of rotations, reflections, and translations:

    MAFS.8.G.1.1a Lines are taken to lines, and line segments to line segments of the same length.

    MAFS.8.G.1.1b Angles are taken to angles of the same measure.

    MAFS.8.G.1.1c Parallel lines are taken to parallel lines.

  • Assessment Limits :
    Items should not include the coordinate plane as the coordinate plane is needed in MAFS.8.G.1.3. Limit the sequence to no more than two transformations. Two-dimensional figures are limited to no more than seven sides. A pre-image and image should not include apostrophe notation as this would give away the identification of similarity and congruence. No reference to the definition of congruence or symbols relating to the definition should be used (HS Geometry).
  • Calculator :

    Neutral

  • Context :

    Allowable

SAMPLE TEST ITEMS (1)

  • Test Item #: Sample Item 1
  • Question:

    Which sequence of transformations results in figures that are similar but not congruent?

     

  • Difficulty: N/A
  • Type: MC: Multiple Choice