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Teacher  Felicia Taylor 

Subject Area  Geometry Honors 
Grade Level  8th 
Week #  8 
Unit of Instruction  2A / 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 
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. 
Classroom Activities 
Monday, October 2nd (2nd Period) / Tuesday, October 3rd (7th & 8th Periods) Do Bellringer Review Bellringer Give Test Grades and Test Retake forms (No tests will be returned until all students have been tested.) Lesson on Congruence Transformations – rigid motion only. Students are to take notes. Practice transformations on IXL (L.1) as a class. Students are to take notes. Classwork: Do IXL L.3 – Translations , L.6 – Reflections , L.9 – Rotations Homework is MathSpace assignment: Transformations and Congruence due Thursday, October 5th (2nd Period) / Friday, October 6th (7th & 8th Periods). Put away iPads and complete Exit ticket to leave class. Wednesday, October 4^{th} Do Bellringer Review Bellringer Classwork: Do IXL L.2 – Translations, L.5 – Reflections, L.8 – Rotations. Grades (SmartScores) will be placed in GradeBook. Put away iPads. No Exit ticket today. Thursday, October 5th (2nd Period) / Friday, October 6th (7th & 8th Periods) Do Bellringer Review Bellringer Lecture: Classifying Triangles, Proving Triangles Congruent – SSS, SAS, ASA, AAS Practice learning about triangles and triangle proofs on IXL – K.1 & K.3 – SSS, SAS, ASA, AAS theorems Homework is MathSpace assignment: Congruence in Triangles – due Monday, October 9th (2nd Period) / Tuesday, October 10th (7th & 8th Periods). Put away iPads and complete Exit ticket to leave class. 
Assignments Due 

Additional Resources 
Congruence Transformations If still confused or need further instruction on Congruence Transformations, please watch the following on Geometry Nation: Section 2, Topic 1: Introductions to Transformations Section 4, Topic 4: Translation of Polygons Section 4, Topic 5: Reflection of Polygons Section 4, Topic 6: Rotation of PolygonsPart 1 Triangles and Triangle Congruence If still confused or need further instruction about Triangles and Triangle Congruence, please watch the following on Geometry Nation: Section 6, Topic 1: Introduction to Triangles – Part 1 Section 6, Topic 2: Introduction to Triangles – Part 2 Section 6, Topic 5: Triangle Congruence – SSS and SAS – Part 1 Section 6, Topic 6: Triangle Congruence – SSS and SAS – Part 2 Section 6, Topic 7: Triangle Congruence – ASA and AAS – Part 1 Section 6, Topic 8: Triangle Congruence – ASA and AAS – Part 2 