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M
1/5/09
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Classes resume. No additional HW is due, but use
this opportunity to patch up missing pieces in your second-quarter HW (due dates
of Nov. 3 or later). It is also strongly recommended that you visit the exam study tips page and get started
on your midterm exam review.
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T
1/6/09
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Quest (50
points) #8A. This quest may cover material
from the entire year, §1.1 through §8.5.
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W
1/7/09
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HW due: Everyone (both A and F period) should do
yesterday’s A period quest for homework,
including diagrams and work. Try to do this in 25 minutes, which was the
intended time limit for the quest. I will spot-check to make sure that you
have done the assignment and may spot-check for accuracy as well. For the
Always/Sometimes/Never questions, you may compare answers with your
classmates, but if you are smart you will want to understand why the correct answers are what they
are. On the other problems and proofs, no copying is permitted, although you
are welcome to confer.
Quest (50 points) #8B. Same
comment as for Tuesday’s quest. If either quest is cancelled because of bad
weather, or if you miss one of them because of an excused absence, there will
be no make-up. For students who take in-class quests, only the better of the
two will count toward your quarter average. We need to reserve Thursday and
Friday for exam review.
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Th
1/8/09
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HW due: pp. 434-437 #1-17 all (omit 8c), 19, 22a,
23, 25, 28, 30. You probably will not be able to finish all of these in one
night. Do as many as you can, and then do the rest for Friday. It is expected
that everyone will do all of the problems. The only non-straightforward ones
are #23 and #25, for which hints are available if you ask.
In class: Review for midterm exam.
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F
1/9/09
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End of second quarter.
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F
1/16/09
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Midterm Exam
(20% of first semester grade), Lower School Music Room, 8:00 a.m. You are encouraged to read the cover sheet thoroughly before the exam so
that you are familiar with the format and the rules.
What to bring: Several sharpened
pencils with erasers. That is all! Nothing more is expected or permitted.
What to leave at home or in the
hallway: Calculator, cell phone, scratch paper, graph paper,
straightedge, compass, notes, PDA, etc. None of these items will be needed on
the exam, not even a straightedge. If you are found with any of these items,
the items may be confiscated, and depending on circumstances, you may be
subject to Honor Council action.
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W
1/21/09
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Classes resume. Welcome to new students! In A period
we now have Daniel, Daniel, Efosa, Mulindi, and Tip. In F period we have
added Michael A. and Michael W., and we are welcoming back Mac after a long
absence. All students, whether new or returning, should review the three rules of classroom behavior, the alphabet, and the HW
policies.
New students should all send me an e-mail message (see contact information) so that I will have your e-mail
address on file. The subject line of the e-mail should begin with two
underscores (__) so that the message is not misinterpreted as spam.
New students also need to know that the following 4 items are required every
day: pencil, textbook, 3-ring binder with your homework for the quarter, and
learning attitude. Although my attendance policies
are fairly standard, there are a few differences here and there from other
teachers’ policies, and you may wish to review them.
In class: Review the four big ideas from last fall (what mathematics is,
induction vs. deduction, remember the X,
remember the bamboo), cover §9.1 and the perfect squares through 400.
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Th
1/22/09
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HW due: Read §9.2 (reading notes are required, as
always); write §9.1 #6, 7, 8, 10, 11, 13a.
For the year, there are a baker’s dozen (13) things
you need to learn for a lifetime. You already know some of these. Don’t
worry, we will pace ourselves. You don’t need to learn them all overnight.
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F
1/23/09
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HW due: Read §9.3 (reading notes are required, as
always); write §9.2 #1-5 all, 8, 9, 10, 12, 17. Do not use a calculator. A
sketch is required for each problem. The standard for all problems that use a
formula is that you must show formula, plug-ins, and answer with units. If
the units are square units or cubic units, you must indicate that. The work
for #1 should resemble the following:
1.  60
units [since  is
slightly greater than 3]
 300
square units
Lightning Quiz (10 pts.): This
will cover the perfect squares. A second (more normally paced) quiz on basic quadratic
facts and square root simplifications is also possible.
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M
1/26/09
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HW due: Read §9.4; write §9.3 #1-5 all, 11, 14, 20.
Additional assignment for Efosa, Mulindi, Michael A., and Michael W.: Reread
the instructions in the 1/21 calendar entry, and send me an e-mail according
to those instructions.
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T
1/27/09
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HW due: Read §§9.5 and 9.6; write §9.3 #20 (now that
you know how to set it up), §9.4 #1, 7, 9, 10, 11, 13, 16, 17, 22, 23. No credit
for people who leave placeholders for #16 and #17 with no attempt to utilize
the hints.
Hint for #16: Let x = AD. First show that BD must equal
10 – x, and then write two
“Pythagorean” equations, one for triangle ADC, and one for triangle BDC. If your
algebra is passing, you can solve the problem from there.
Hint for #17: Use the Pythagorean
Theorem to find the hypotenuse of the triangle in the lower left corner.
Then, use that hypotenuse as a leg
of the next triangle to find out that triangle’s hypotenuse. Continue in this
fashion until you find x, which is
the hypotenuse of the final triangle.
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W
1/28/09
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HW due: Read §9.7; write §9.5 #3, 6, 9, 12*, §9.6
#1-6 all, 15.
* Required
method for #12: Set up your square (wlog) to have vertices at (0, 0), (a,
0), (0, a), and (a, a). This is an example of what is called a coordinate geometry proof.
Note regarding weather: Although
there is no school today because of the ice storm, our homework schedule
continues without interruption. On Thursday, January 29, you need to have all
assignments through §9.7 (and §9.8 reading notes) written out and ready to
collect. Please call 703-599-6624 if you have any questions or need help
completing the homework. No call, no credit.
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Th
1/29/09
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HW due: Read §9.8; write §9.7 #1, 2, 4, 5, 7, 8, 9,
14, 15, 20. This assignment and yesterday’s assignment are due even though
there was no school yesterday. Please call 703-599-6624 if you need help with
any of the homework problems. No call, no credit.
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F
1/30/09
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HW due: Write §9.8 #1-5 all, 13, 14; write p. 429
#1, 2, 3.
Double Quiz (10 pts. + 10 pts.) on
§§9.1 through 9.7. One of the quizzes will consist of a coordinate
geometry proof, and the other will consist of several problems in which you apply
families of triangles (usually Pythagorean triples, 30-60-90, or 45-45-90
families, but with an occasional exception) to find missing sides. Examples
of each quiz are shown below.
Sample Quiz I. Use a coordinate
geometry proof to show that the diagonals of any rhombus are perpendicular
but not necessarily congruent.
Sample Quiz II. Sketch each of the
following right triangles and write an expression for the missing side. No
work is permitted. Calculators are not permitted. Do not simplify your answers.
1. Legs of 5 and 12.
2. Leg of 3, hypotenuse of 4.
3. Leg of 3.5, hypotenuse of 7.
4. Leg of 4, hypotenuse of  .
5. Legs of  each.
Solutions to the two sample quizzes are posted at hwstore.org.
Bonus Contest: The ATLANTIC RUG
BONES contest has been solved by a HappyCal student (the answer was ANGLE
SUBTRACTION), but you can still earn 2 pts. for unscrambling one of the
following geometry terms and phrases. Only the first person to respond gets
the points. If you work with someone, you can split the points.
1. CAPE FOG NINNY TOT
2. ASININE SOUL RECUR DIGRESS
3. SIR ORANGUTAN DECLARE COT
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