Checked over practice solutions. Briefly introduced similarity as a process involving dilations and proportions. Took assessment.
Upcoming Calendar:
A-days B-Days
Homework:
watch and take notes on this video: direct link
Passed back assessments (1B had 7 minutes to finish theirs), went over coordinate quadrilaterals with peer experts. Took district benchmark on S1 standards.
Upcoming Calendar:
A-days B-Days
Homework
Take notes on this video: direct link
Warm up on finding if given figures are similar and finding lengths if two shapes are similar. Examined area relationships during dilation and how the linear and area scales are different, but by a square factor. Created a compass-straightedge dilation, then briefly reviewed coordinate grid dilations (see Monday's video above for this). Then applied similar triangles in a real-world problem dealing with shadow length and learned the 3 similarity critiera for triangles (AA~, SSS~, and SAS~)
Notes from board
Homework
p. 255 # 1, 4, 10
p. 260 #7-13
Resources
dilation on the coordinate plane: see video from Monday, plus this one (starts at 2:15): link
determining scale factor on coordinate plane: link
finding missing sides given similarity: see video assigned Tues/Wed or this link
how to determine if two triangles are similar (SSS~, AA~, and SAS~) link
examples on how to show if two triangles are similar: link