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# MAFS.912.G-SRT.1.3

Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.
Subject Area: Mathematics
Domain-Subdomain: Geometry: Similarity, Right Triangles, & Trigonometry
Cluster: Level 2: Basic Application of Skills & Concepts
Cluster: Understand similarity in terms of similarity transformations. (Geometry - 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 of Last Rating: 02/14
Status: State Board Approved
Assessed: Yes

### TEST ITEM SPECIFICATIONS

Also assesses:

MAFS.912.G-SRT.2.4

• Assessment Limits :
Items may require the student to be familiar with using the algebraic
description for a translation, and
for a dilation when given the center of dilation.
Items may require the student to be familiar with the algebraic
description for a 90-degree rotation about the origin,
, for a 180-degree rotation about the origin,
, and for a 270-degree rotation about the origin,
. Items that use more than one transformation may
ask the student to write a series of algebraic descriptions.
• Calculator :

Neutral

• Clarification :
Students will explain using properties of similarity transformations
why the AA criterion is sufficient to show that two triangles are
similar.

Students will use triangle similarity to prove theorems about
triangles.

Students will prove the Pythagorean theorem using similarity.

• Stimulus Attributes :
Items may be set in a real-world or mathematical context.
• Response Attributes :

None