#### MAT-HS.G-SRT.05.c

 MAT-HS Targeted Standards(G) Concept: Geometry(SRT) Domain: Similarity, Right Triangle, and TrigonometryCluster: Prove theorems involving similarity MAT-HS.G-SRT.05.c Use similarity criteria to prove relationships in geometric figures.

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## Proficiency Scale

 Score Description Sample Activity Advanced In addition to Score 3.0, the student demonstrates in-depth inferences and applications regarding more complex material that go beyond end of instruction expectations. 3.5 In addition to Score 3.0 performance, the student demonstrates in-depth inferences and applications regarding the more complex content with partial success. Proficient “The Standard.” The student demonstrates no major errors or omissions regarding any of the information and processes that were end of instruction expectations. Use AA, SSS, and SAS Similarity Theorems to prove triangles similar Justify conclusions using valid mathematical arguments. Sketch the triangles using the given description. Explain/Justify whether the two triangles can be similar. 2.5 The student demonstrates no major errors or omissions regarding the simpler details and processes (Score 2.0 content) and partial knowledge of the more complex ideas and processes (Score 3.0 content). Progressing The student demonstrates no major errors or omissions regarding the simpler details and processes but exhibits major errors or omissions regarding the more complex ideas and processes (Score 3.0 content). recognize vocabulary such as similarity, corresponding sides, and proportional recognizes the similarity criteria for triangles (SAS, AA, SSS) Are the triangles similar? If so, state the similarity and the postulate or theorem that justifies your answer. 1.5 The student demonstrates partial knowledge of the simpler details and processes (Score 2.0 content) but exhibits major errors or omissions regarding the more complex ideas and procedures (Score 3.0 content). Beginning With help, the student demonstrates a partial understanding of some of the simpler details and processes (Score 2.0 content) and some of the more complex ideas and processes (Score 3.0 content). - 0.5 With help, the student demonstrates a partial understanding of some of the simpler details and processes (Score 2.0 content) but not the more complex ideas and processes (Score 3.0 content). 0.0 Even with help, the student demonstrates no understanding or skill. -

## Resources

 Web Vocab