(4A did not meet today because of weather.) Warm up dealt with segment addition problem involving a midpoint. Went over homework, then did hospital location task which involves making the perpendicular bisector equation given two points (by first finding the midpoint, then the slope, and then making the perpendicular slope). This involved using the point-slope form a line: y-y1=m(x-x1). Passed out practice assessment.
Notes from board
Homework
complete practice assessment [blank copy] [SOLUTIONS]
plan to assess Tues/Weds
Resources
writing equation of perpendicular bisector (similar to task in class): link another example
determine if equations graph parallel, perpendicular lines or neither: link
graph a line perpendicular to given line, through given point: link
finding equation of a line through given point parallel to given line: link
perimeter of shape on coordinate plane, Pythagorean Theorem method: link link 2
perimeter of triangle on coordinate plane, distance formula method: link link 2
using the midpoint formula: link
using the distance formula: link
how to name things: see chart on page 4 in textbook: digital version
video on how to name points, lines, rays, and angles: link
naming points, angles, and rays: link
naming angles, more explanation: link
Odd schedule this week with the storm. 1B/2A/3A did review and extra practice with parallel and perpendicular line equations and graphing, then learned about vectors, vector notation, and finding points along a vector that divide it into a particular ratio (for example, "2/5 of the way from point A to point B" or "into a 2:3 ratio") 4A meanwhile learned about point-slope form and how to write the equation of a line through a point with a particular slope (either parallel or perpendicular to a given line). Then worked on practice assessment.
1B 2A 3A Notes from board
4A Notes from board
Homework
1B/2A/3A: p. 389 #11, 12 p. 390 #10,11
4A: Practice assessment: see Monday's post above for blank copy as well as solutions!!!
Assessment rescheduled to Monday 9/18 (see Monday's post above for plenty of study resources)
Resources
simple case of partitioning directed line segment: link
more sophisticated examples of partitions: link