Today was a normal B-day. Warm up dealt with finding isosceles triangle area given the hypotenuse. Briefly previewed 3rd quarter curriculum topics before reviewing similarity concepts from last quarter. Examined several indirect measurement problems, including the case of overlapping triangles (often with artificial light source) and parallel lines creating similar triangles and using angle of incidence and reflection in indirect measurement problems without light or shadows. Finally created our own indirect measurement problems and solved each others'.
Notes from board
Homework
p. 272 #7, 12, 13 [SRT-B5c]
Resources
indirect measurement with mirror vs sun shadows: link
real world indirect measurement with mirror: link
using parallel lines in triangles to create and solve proportions: link (starts at 5:09)
Warm up dealt with Pythagorean Theorem and perimeter. Reviewed similarity topics briefly, then examined indirect measurement in detail involving multiple problem types including triangles cut by parallel lines and angle of reflection/incidence. Ended class with hands-on examination of similarities that exist within right triangles.
Notes from board
Homework
p. 272# 7, 12, 13
p. 281 #1, 2
Resources
indirect measurement with mirror vs sun shadows: link
real world indirect measurement with mirror: link
using parallel lines in triangles to create and solve proportions: link (starts at 5:09)
visualizing and understanding the similar triangles within a right triangle: link