Passed back assessments on quadrilaterals. Projects still being graded. Started unit on similarity. Also performed dilation on a triangle (very much like this link) (SRT-A1)
Homework:
Watch and take notes on the following video (SRT-A1) (click here for direct link to video) (here is a non-youtube link)
Estimation warm up dealing with ratios. Finished dilation, looked at side and angle relationships in similar figures. Saw that angles remain constant (congruent) whereas side relationships are in equal proportion. Then saw similarity in different art contexts, and saw application problem dealing with wallet size photographs. Handed out practice assessment (blank copy here).
Homework:
Complete practice assessment
SOLUTIONS LINKED HERE
(SRT-A1, A1a, A1b)
Resources:
dilation and segment stretching (what we did with compass/straight edge) link
dilating figure on coordinate plane on point that is not the origin: link
dilating a figure on the coordinate plane (similar to #1 on practice) link
relationship between scale factor and area (similar to #2 on practice) link
another video dealing with area, like #2 link
finding scale factor from two figures (#3 on practice) link (<--made by Mr M just for you!)
determining if two figures are similar (#4 and #5 on practice) link another one (like #5) link
another video for #4 and #5 link
finding missing side lengths on similar figures (#6 and 7 on practice) link
very simple example made by students for #6 and 7 link
Warm up went over a commonly missed MICAtime problem, Went over practice assessment and took real assessment. Then discussed similar triangles through an application involving mini golf. Developed the AA similarity shortcut and saw how it can be used to solve problems using the idea of angle of incidence and reflection.
Homework:
p. 271 #1abcde (SRT-A3a)
Resources
what the similarity shortcuts are and how to use them link
good examples similar to hw problems link
similarity theorem basics link