Our goal in block today was to get better at interpreting marked sketches of triangles to determine why they are congruent and to name the triangles correctly. We also worked on developing proofs based on congruent triangles in preparation for the next lesson.
We warmed up with "What is the difference between SSA and SAS when you look at a sketch?" What about ASA vs. SAA?
We went over homework and the 4 shortcuts that work and the two that do not. Suggestions were given about writing up the conjectures. C-24-25 are on pp 28-29 (They are congruent), with sketches to copy from p 227. C-26-27 are on p 233 and 235. Sketches are still on p 227.
If you have not written up C-17-19 and 21-23, then you need to scroll to previous posts and find where I have posted those.
We did a worksheet in class to practice recognizing type of congruence, attached below with answers. We did some problems from section 4.5 that are the same as p 236: 4, 6-8, 10-12 of new textbook.
We then did an activity to do a fill-in-the-blank proof of C-18 - Base angles of an isosceles triangle are congruent. This is attached below and should be written into your in-class section. We also did a fill-in-the-blank proof of C-19, converse of isosceles triangle theorem. The blanks are attached below.
HW #10 is to finish writing up the conjectures described above and do p 235: 1-2, 5, 9, 13-18.
We warmed up with "What is the difference between SSA and SAS when you look at a sketch?" What about ASA vs. SAA?
We went over homework and the 4 shortcuts that work and the two that do not. Suggestions were given about writing up the conjectures. C-24-25 are on pp 28-29 (They are congruent), with sketches to copy from p 227. C-26-27 are on p 233 and 235. Sketches are still on p 227.
If you have not written up C-17-19 and 21-23, then you need to scroll to previous posts and find where I have posted those.
We did a worksheet in class to practice recognizing type of congruence, attached below with answers. We did some problems from section 4.5 that are the same as p 236: 4, 6-8, 10-12 of new textbook.
We then did an activity to do a fill-in-the-blank proof of C-18 - Base angles of an isosceles triangle are congruent. This is attached below and should be written into your in-class section. We also did a fill-in-the-blank proof of C-19, converse of isosceles triangle theorem. The blanks are attached below.
HW #10 is to finish writing up the conjectures described above and do p 235: 1-2, 5, 9, 13-18.
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