Warm up involved completing congruence statements for triangle pairs. Began unit on triangle congruence, which dealt with identifying all the corresponding parts (6 pairs: 3 pairs of angles, 3 pairs of sides). This simple idea leads to the bigger idea of CPCTC: corresponding parts of congruent triangles are congruent. Proving things can be boring if everything is laid out however, and it is much more interesting and creative when only limited information is provided and you have to reason through the pieces and make careful observations to figure out the case. This introduced the 4 congruence criteria "shortcuts" (the minimum information we need to guarantee two triangles are congruent) which are SSS, SAS, ASA, and AAS. Also looked at the 2 cases that don't work: AAA (shapes could be dilated versions of each other) and SSA (the same pieces could create two triangles.
Notes from board
Homework
p. 146 #6-11
tessellations due on Monday; next assessment Monday
Resources
understanding congruence statements: link
Went over homework, then worked on computers to learn more about applying triangle congruence. HERE IS THE ACTIVITY
Homework
this handout: link
assessment Monday; tessellations due Monday
Resources
examples just like the hw! made by me :) link
how to recognize which congruence criteria is illustrated (made by me :)) link
some great examples very similar to the hw: link
Warm up dealt with identifying congruence criteria and adding information in order to use a specific criteria. Went over homework, then learned how to write paragraph proofs to show triangles congruent. Worked through several examples, then passed out practice assessment.
Notes from board
Homework
do the practice assessment (blank copy) (SOLUTIONS)
assessment is Monday
Tessellations also due Monday
Resources
using congruence statements to determine values: link
recognizing which criteria is shown and writing a congruence statement: LINK
identifying translation vectors: link
identifying the line of reflection link
identifying the angle of rotation: link
describing a series of rigid motions to carry one figure onto another: link