Completed a task on triangle angle measures. After measuring given triangle angles and making our own and measuring, we made the conjecture (educated guess, not yet proven) that the 3 angles of a triangle add up to 180degrees. Here is the task worksheet.
Next we took a quiz on chapter 3 vocabulary (angle relationships, transversals, parallel and perpendicular segments and planes.)
Homework:
-Vocab from sections 4.1 thru 4.3 in textbook (17 words in all)
-TEST on chapter 3 material on Thursday/Friday, study guide and sample test to be given out Tuesday/Wednesday.
Resources:
Parts of a protractor
Using a protractor
Acute Angles
Right Angles
Obtuse Angles:
See here for ch3 vocab resources: link
Also videos from last week's post
Tuesday/Wednesday
We started class with a journal (which we wrote in notes, since the review was important) to describe how the words rise and run lead directly to the formula for slope.
The vocab quizzes were returned and discussed. We then individually drew a big triangle and without measuring with a protractor, tried to think about a pattern or argument that would prove that all 3 angles add up to 180deg, like we suspected yesterday by measuring. Here is that proof: VIDEO
Next we did a parallel lines and algebra task where we each solved an individual problem, then exchanged problems with partners and then drew out our solutions on chart paper.
Finally we reviewed for the test by completing the sample test, provided with a study guide,
CLICK HERE FOR SAMPLE TEST SOLUTIONS
Homework: TEST THURSDAY/FRIDAY, see above for sample test/study guide
Thursday/Friday
Test on lines and angles. B-block classes Friday also explored the Triangle Angle Sum poof that was omitted from Wednesday's lesson. Here is the video for that: link
Homework: Workbook p. 21: #1-9
Copy of worksheet available here
Resources;
Triangle types: (scroll down)
Triangle types applet