First off, there was a mistake on problem 7 on the bounded area worksheet. The 4 sides are supposed to make a parallelogram. Please change the word "x-axis" to "y-axis". The corrected form is attached below.
Our big picture today was circles: Pi, Circumference, Area, where they come from, and how to manipulate algebraically to get from one known to an unknown. We also discussed the idea of "leaving in terms of Pi" to get an accurate answer, versus an approximate answer that comes from putting Pi in the calculator and rounding. Watch out for both on the homework.
We added 3 problems to HW #2 and checked it for a 4 pt grade (except in 4th period). The problems were 11, 19, and 20 on pp 422-3. The answers were 11) P = 254 cm, 19) A = 996 cm squared, and 20) A is approximately 497 cm squared.
We went over homework carefully, showing algebra, answering questions.
The last part of class was used to work on 7 bounded area problems (attached, with answer document).
Then HW #3 is p 422-3: 1-8, 13-14, 17-18, and p 424: 23-24, p 417: 9,12. In 4th and oB, I gave 13-15 on p 422 and did not assign the problems from p 417 or 424.
Our big picture today was circles: Pi, Circumference, Area, where they come from, and how to manipulate algebraically to get from one known to an unknown. We also discussed the idea of "leaving in terms of Pi" to get an accurate answer, versus an approximate answer that comes from putting Pi in the calculator and rounding. Watch out for both on the homework.
We added 3 problems to HW #2 and checked it for a 4 pt grade (except in 4th period). The problems were 11, 19, and 20 on pp 422-3. The answers were 11) P = 254 cm, 19) A = 996 cm squared, and 20) A is approximately 497 cm squared.
We went over homework carefully, showing algebra, answering questions.
The last part of class was used to work on 7 bounded area problems (attached, with answer document).
Then HW #3 is p 422-3: 1-8, 13-14, 17-18, and p 424: 23-24, p 417: 9,12. In 4th and oB, I gave 13-15 on p 422 and did not assign the problems from p 417 or 424.
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