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Teacher  Felicia Taylor 

Subject Area  Geometry Honors 
Grade Level  8 
Week #  9 
Unit of Instruction  2(A): Triangle Congruence and Proofs 
Standard(s) Taught 

MAFS.912.GCO.1.2 MAFS.912.GCO.1.3 MAFS.912.GCO.1.4 MAFS.912.GCO.1.5 MAFS.912.GCO.2.6 MAFS.912.GCO.2.7 MAFS.912.GCO.2.8 MAFS.912.GCO.3.10 MAFS.912.GSRT.2.5 
Learning Targets and Learning Criteria 
• draw transformations of reflections, rotations, translations, and combinations of these using graph paper, transparencies, and/or geometry software. • describe and illustrate how a rectangle, parallelogram, and trapezoid are mapped onto themselves using transformations. • define preimage and image, and use correct notation (A vs. A’) • draw a specific transformation when given a geometric figure and a rotation, reflection, or translation. • define and use rigid motions as reflections, rotations, translations and combinations of these, all of which preserve distance and angle measure. • identify corresponding sides and corresponding angles of congruent triangles. • list the conditions to prove triangles are congruent. • apply triangle congruence and triangle similarity to solve problems (e.g., indirect measure, missing sides/angle measures, side splitting). 
Classroom Activities 
Monday (2nd Period) / Tuesday (7th & 8th Periods) Bellringer – Translations Lecture on – Isosceles Triangles, Equilateral Triangles, Compositions of Transformations, Dilations Classwork: Practice on IXL (not graded assignments):
Homework (graded assignment – formative): MathSpace – Find sides and angles with congruence Wednesday (Early Release Day – Short Class Period) Review for Unit 2(A) test by reviewing theorems and practicing solving for congruence. Thursday (2nd Period) / Friday (7th & 8th Periods) Unit 2(A) Test (summative) If complete test before class period ends, complete missing and late assignments as the grading period ends on Monday, October 16th.

Assignments Due 
Summative: Unit 2(A) Test – Thursday, October 12th (2nd Period) / Friday, October 13th (7th & 8th Periods) Formatives: MathSpace

Additional Resources 
Please refer to attached Lecture Notes and Unit 2(A) Study Guide. 