# Q2, W4: November 4-8 Geometry

Teacher Kristin Andreason Geometry Honors 8 November 4-8 Unit 2B: 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.

Learning Targets and Learning Criteria
• Students will be able to identify the congruent parts of two triangles
• Students will be able to determine whether or not two triangles are congruent by the Triangle Congruence Postulates (SSS, SAS, ASA, AAS, and HL)
• 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.
Classroom Activities

Monday/Tuesday:

• Students will take notes in their ISN on CPCTC
• Students will then do a Triangle Congruence Proofs activity in small groups

Wednesday:

• Students will finish their small group proofs activity
• Students will do IXL K.5 and/or finish other IXL’a previously assigned

Thursday/Friday:

• Students will do a Proofs Partner Activity–they will complete 8 proofs by filling in missing statements or reasons from a word bank
Assignments Due
• The Triangle Congruence Proofs activity is due on November 5.
• The Proofs Partner Activity is due on November 8.