Passed out information about geometry project. It is due November 23 for B day and November 24th for A day. Info here.
Took assessment on congruence proofs and some triangle theorems (angles, midsegment,centroid, etc.)
Homework:
Finish p. 203-204 from last week for tomorrow (will be collected).
Passed back assessments. Did a review problem relating to exterior angle theorem since a lot of people had trouble with it on the assessment. Began introduction to quadrilaterals. Looked at some interesting real world applications. Then examined the parallelogram and saw how consecutive angles are supplementary, opposite sides are congruent, opposite angles are congruent, and diagonals bisect each other. These facts were also explored in a hands-on demo using index cards. Lecture notes linked here
Here is info on how to make the cool Miura fold we looked at: link
Homework: p. 215# 11 and 12 (CO-C11a)
Resources:
consecutive angles idea: https://www.youtube.com/watch?v=smrj2KBK8ok
consecutive and opposite angles applet: http://mathopenref.com/parallelogramangles.html
parallelogram info/theorems: http://mathopenref.com/parallelogram.html
parallelogram diagonals: http://mathopenref.com/parallelogramdiags.html
Warm up was instructional, dealing with a coordinate parallelogram showing that opposite sides of a parallelogram are congruent and that diagonals bisect each other. Went over homework, then completed a foldable which described the properties of the different types of parallelograms. Also completed a hierarchy/ranking of the quadrilaterals. Here is the completed version for anyone absent. Did some practice problems at the end of class. Lecture notes here
Homework:
p. 221: #5-10, 13 (CO-C11a)
Resources:
parallelogram diagonals: link
parallelogram angles: link
rectangle definition: link
rectangle diagonals: link
rhombus definition: link
rhombus diagonals: link
square definition: link
square diagonals: link
video similar to class: https://www.youtube.com/watch?v=o3BtKf1yO2s
rhombus angles (helps with #9) video link
notes/examples on rectangles/rhombuses/squares: link