# Q2, W2: November 9-13 Geometry Teacher Kristin Andreason Geometry Honors 8 November 9-13 Unit Two (B): Congruence of Proofs with Triangle Properties
Standard(s) Taught

MAFS.912.G-CO.2.7: Use the definition of congruence in terms of rigid motions to show that two triangles are congruent if and only if corresponding pairs of sides and corresponding pairs of angles are congruent.

MAFS.912.G-CO.2.8: Explain how the criteria for triangle congruence (ASA, SAS, SSS, and Hypotenuse-Leg) follow from the definition of congruence in terms of rigid motions.

MAFS.912.G-SRT.2.5: Use congruence and similarity criteria for triangles to solve problems and to prove relationships in geometric figures.

Learning Targets and Learning Criteria
• identify corresponding sides and corresponding angles of congruent triangles.
• explain that in a pair of congruent triangles, corresponding sides are congruent (distance is preserved) and corresponding angles are congruent (angle measure is preserved).
•  demonstrate that when distance is preserved (corresponding sides are congruent) and angle measure is preserved (corresponding angles are congruent) the triangles must also be congruent.
• list the conditions to prove triangles are congruent.
• map a triangle with one of the conditions (e.g., SSS) onto the original triangle and show that corresponding sides and corresponding angles are congruent.
•  explain AAS as criterion for congruence, and demonstrate that SSA and AAA do not prove congruence.
• apply triangle congruence and triangle similarity to solve problems (e.g., indirect measure, missing sides/angle measures, side splitting).
• apply triangle congruence and triangle similarity to prove relationships in geometric figures.
• use CPCTC (Corresponding Parts of Congruent Triangles are Congruent) to find missing sides/angles AFTER triangles are proved congruent.
Classroom Activities

Monday/Tuesday:

1. Students will log onto Zoom
2. We will create a foldable on Triangle Congruence
3. We will look at examples from the Triangle Congruence packet together
4. We will do pages 96-97 in the Math Nation workbook together
5. Students will do IXL K.1

Wednesday:

• NO SCHOOL–VETERANS DAY

Thursday/Friday

1. Students will log onto Zoom
2. Students go onto Edgenuity and do the following:
1. Triangle Congruence SAS (Instruction and Quiz)
2. Triangle Congruence ASA and AAS (Instruction and Quiz)
Assignments Due
• IXL K.1
• Edgenuity Quizzes on Triangle Congruence