Download G-SRT.A.3

Mathematics Curriculum Supplement
Geometry (G-SRT.A.3)
Geometry
Mathematics
Highly-Leveraged Standard1
G-SRT.A.3 Use the properties of similarity transformations to establish the AA criterion for two triangles to be similar.
Student Learning Targets:
Students will be able to:
 explain the minimum requirements to prove triangles are similar.
 explain congruent triangles are also similar.
 use dilations to derive the Angle-Angle (AA) similarity criterion.
 prove triangles are similar using Angle-Angle similarity criterion.
Performance Level Descriptors
Standard
Minimally Proficient
Partially Proficient
Proficient
Highly Proficient
The Minimally
The Partially Proficient
The Proficient student
The Highly Proficient
Proficient student
student
student
Similarity, Right Triangles and Trigonometry
G-SRT.A
Identifies similarity
Identifies triangle
Establishes the AA
Proves that two triangles
[3]
transformations.
similarity by the use of
criterion for two
are similar if two angles
the AA criterion.
triangles to be similar by of one triangle are
using the properties of
congruent to two angles
similarity
of the other triangle,
transformations.
using the properties of
similarity
transformations.
1
Highly-Leveraged Standards are the most essential for students to learn because they have endurance, leverage and essentiality.
This definition for highly-leveraged standards was adapted from the website of Millis Public Schools, K-12, in Massachusetts, USA.
http://www.millis.k12.ma.us/services/curriculum_assessment/brochures
Specifically for mathematics, the Highly-Leveraged Standards are the Major Content/Clusters as defined by the AZCCRS Grade
Level Focus documents. They should encompass a range of at least 65%-75% for Major Content/Clusters and a range of 25%-35%
for Supporting Cluster Instruction. See the Grade Level Focus documents at:
https://cms.azed.gov/home/GetDocumentFile?id=57069f7baadebe0bccd0a8b5
TUSD Department of Curriculum and Instruction
Curriculum 3.0
Revised 4/30/2017 10:19 AM
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