Welcome
to the Geometry Zone
(Geometry,
Periods A and F)
Web address shortcut for this page: www.modd.net/78geom
Are you
nervous when you see NCWEE? concerned when you see CIRC? perturbed when you see
PBC? Visit Mr. Hansen’s fabled abbreviations page
to make sense of those cryptic markings you see on your papers.
Schedule
at a Glance (see archives for older entries) 


M
5/19/08 
Test (100
pts.) on §15.3 (Hinge Theorem) and §§9.99.10
(trigonometry and inverse trigonometry). 

T
5/20/08 
Field trip to the National
Cryptologic Museum, Fort Meade, MD. Bus will depart at 8:00 a.m. Bus will
probably be loading in the area near SatterleeHenderson Field, but stay
alert and try not to miss the bus! Attendance will be taken. If you attend
the field trip, you are excused from A through E periods and the first half
of F period. If you do not attend the field trip, you must attend all your
classes. F period geometry class will probably start about 10 minutes late,
at approximately 12:45. 

W
5/21/08 
Review for final exam. 

Th
5/22/08 
Review for final exam. 

F
5/23/08 
Last day of school/wrapup. 

M
6/2/08 
Final Exam,
8:00–10:00 a.m., Lower School Music Room.
The exam covers chapters 8 through 15, as well as
the basic supporting facts from the first semester. For example, you cannot
forget what the words “complementary” and “supplementary” mean, even though
those topics were covered and tested in the first semester. When preparing
for the exam, it should be sufficient to focus on the chapter summaries and
chapter review questions at the end of chapters 8 through 15. Format of the
exam will be as follows:
Example
MultipleChoice Question. Choose
the letter of the best answer. 1. A young person is standing on level ground 6 feet
from the base of a 10foot lamppost on a sunny day. The angle of the sun is
such that the shadow cast by the top of the young person’s head exactly
coincides (on the ground) with the shadow cast by the tip of the lamppost at
a point that is 22 feet from the base of the lamppost and 16 feet from the
young person’s foot. How tall is the young person? (B) feet (C) feet (D) feet (E) Insufficient
information. Either (A) or (C) could be
correct, depending on which side of the lamppost the sun is located with
respect to the young person. Work the problem and commit yourself to an answer,
and then check your answer against the solution key below. Example
Procedural Essay Question. You may
abbreviate, and sentence fragments are permitted. However, misspellings and
blatant grammatical or wording errors may result in point deductions. 2. Explain how the principle of compound locus allows
one to find the circumcenter of any triangle. Example
Coordinate Geometry Proof. 3. Prove that the diagonals of an isosceles
trapezoid cross in such a way that two isosceles triangles are formed, one
for each base. (You may assume that with an isosceles trapezoid, the longer
base protrudes from the shorter base by an equal length on each side. This
property is a consequence of the fact that the diagonals are congruent.) After you have made a reasonable effort to solve all
three problems on your own, click here to
see the solutions. Warning: Do not
peek before you have tried to solve the problems with pencil and paper.
Otherwise, you are simply deluding yourself. 

Fun Links:
 New
world record for paper folding! Pomona, CA, teenager achieves a seemingly
impossible 12 folds!
 Lots and lots of online IQ tests
 Fallacious proof that pi
equals 5
 An extension of the concept of freshman cancellation
 National
Cryptologic Museum, brought to you by
the National Security Agency
 The famous three
houses/three utilities puzzle
 The amazing ninepoint
circle
 Abusive
tax shelters: Maybe you will use your education to devise clever schemes
like this, or better yet, to try to eliminate them
 More
fun links on Mr. Hansen’s home page
StudyRelated Links:
 Midterm exam study guide and practice
exam
 Anglearc puzzles written by
the Class of 2006 (in 2003)
 More anglearc puzzles written
by the Class of 2007 (in 2004)
 Brain teasers written by the
Class of 2008 (in 200405)
 Timed math quizzes,
courtesy of Mr. Errett
 Quizzes, quizzes, and more quizzes for geometry and other math subjects (don’t let the
title ‘Math for Morons’ discourage you—that’s really a moronic name for the
site)
 Proficiency
test for rising 9th graders from the great state of Illinois
 B.J. Pinchbeck’s Homework Helper
for all subjects
 Practice test: Chapter 1
Serious Links (click here)
Return to Mr. Hansen’s home page
Return to Mathematics Department home page
Return to St. Albans home page
Last updated: 29 May 2008