Today in class our focus was 2-fold: practice looking at sketches and figuring out if triangles are congruent, which shortcut, and which triangles AND learn to write a mini-proof where you are given a sketch and some information, you notice one more congruent part, decide why triangles are congruent, so then some 4th part is congruent.
In class, we did a practice worksheet for just finding congruent triangles and why. We then did a mini-proof fill in the blank for Diagonals of a Rectangle are Congruent. Then we modeled one more mini-proof and worked on the 9 problems on p 231 (0ld textbook), p 240 (new textbook). Do not follow the directions in the book. We are actually turning these into proofs. We will finish this in class the next time we meet.
The only homework is to get your Geometric Truth caught up. We have completed Conjectures 17-19 and 21-27 in this unit. In the Construction Unit we did 5-16 and definitions of segment bisector, perpendicular bisector, altitude, and median. In the transformation unit, we only defined "congruent figures" and "composition of transformations". If you need resources, scroll down through the blog posts, reading for information about conjectures and sometimes for attachments.
Attached: class worksheet and answers, fill-in-the-blank proofs and example of proof from p 231 (240).
c-19_fitb_with_answers.pdf |
triangle_congruence_practice_w_answers.pdf |
mini-proof_examples_practice.pdf |