| Page(s) |
Line(s) |
Description |
Date |
Discoverer |
| 16 |
15 |
The term GE should be marked as
a ray, instead of a segment. |
Oct. 11, 2006 |
Kristin Sturm |
| 54 |
Def 2.5 |
Many authors define
supplementary in terms of angle measure, and use the term
"linear pair"
for Def 2.5. The author wished to keep the angle
definitions free
from language of angle measure, and still keep the more familiar
notion
of supplementarity, thus the motivation for the definition as
stated. |
February 12, 2006 |
Dr. Mohammad Salmassi |
| 60 |
(-12) |
Replace "exterior angle" with
"corresponding angles" |
June 19, 2008 |
Scott Johnson |
| 66 |
8 |
Replace "four axioms of 'order'"
with "four axioms of 'order' or 'betweenness'" |
Sept. 20, 2006 |
Mike Hvidsten |
| 66 |
9 |
Replace "Pasch's Axiom" with
"Pasch's Axioms of order" |
Sept. 20, 2006 | Mike Hvidsten |
| 67 |
Def 2.16 |
Replace "\angle{ABC}" with
"\angle{CAB}" |
Sept. 19, 2006 | Josh McCollam |
| 76 | Def 2.20 | Replace "into congruent pairs." with "into congruent pairs, or if one figure can be made congruent to the other by adding or deleting pairs of congruent polygonal pieces." | Feb. 28, 2013 | Mike Hvidsten |
| 122 |
Ex 3.3.2 |
The equation listed should have
an arrow over the "D" term. |
Sept. 29, 2006 |
Kendi L Beyer |
| 130 |
(-7) |
Replace "x^2 +1 has a solution"
with "x^2 +1=0 has a solution" |
May 6, 2012 |
Tobi Lehman |
| 135 |
(-8) |
The line should start "2Ax + 2By + ..." instead of "2Ax + 2Bx + ..." | April 13, 2008 |
Scott Johnson |
| 135 |
(-6) |
The line should end "... + 2Ax + 2By = C + D" instead of "... + 2AX + 2By = C + D" | April 13, 2008 | Scott Johnson |
| 184 |
7 |
Replace "Let l, n be parallel"
with "Let l, m be parallel" |
June 19, 2008 |
Scott Johnson |
| 191 |
Fig. 5.5 |
Caption should be "Insect and
Arachnid Symmetry" |
June 19, 2008 | Scott Johnson |
| 193 |
Ex 5.2.14 |
Replace two instances of
"product" with "composition" |
3-9-2006 |
Nancy Wrinkle |
| 194 |
5 |
Replace "y-(-2K-y)" with "y-(-2K
-(-y))" |
11-7-2006 |
Megan Reinders |
| 199 |
13 |
Add a new sentence "(r_m(l_1) =
{r_m(A) | A is on l_1})" |
3-9-2006 |
Nancy Wrinkle |
| 201 |
16 (-6) |
Replace "Let R be a rotation"
with "Let R \ne id be a rotation" |
10-16-2006 |
Mike Hvidsten |
| 202 |
1 |
Replace "For the second part of
the theorem, we can assume B has ..." with "For the second part
of the
theorem, note that if m \angle{B O R(B)} is \theta, then m
\angle{B'O
R(B')} is \theta for all points on \line{OB}. So, we can assume
that B
has ..." |
10-16-2006 |
Mike Hvidsten |
| 202 |
7 |
Replace "then \overline{A
R(A)} \cong \overline{B R(B)}, and by" with "then \overline{A R(A)} \cong \overline{B R(B)}. If A, O, and R(A) are collinear, then A and R(A) are on oppositie sides of O on \line{OA}. Also, B, O, and R(B) must be collinear and on opposite sides of O on \line{OB}, as if they were not, we would get a triangle whose sides do not satisfy the triangle inequality (Prop I-20 of Book I of The Elements. If A, O and R(A) are non-collinear, then by ..." |
10-16-2006 |
Mike Hvidsten |
| 216 |
23 |
Replace "the fourth condition is
true" with "the second condition is true" |
3-21-2006 |
Mike Hvidsten |
| 230 |
15 (-4) |
Replace "center at A" with
"center at B". |
11-4-2005 |
Mike Hvidsten |
| 238-239 |
All references to the "dihedral
group of order n" should be replaced by "dihedral group of order
2n". |
11-15-2004 |
Geometry class at Gustavus -
fall 2004 |
|
| 247 |
6 |
Replace "skew" with "not
parallel" |
11-29-2004 |
Preston Nichols |
| 270 |
12 |
Replace "Also, neither of these can intersect l at a point other than P inside the boundary circle." with "Also, neither of these can intersect l at a point inside the boundary circle." | 11-29-2004 | Preston Nichols |
| 282 |
21 |
In the statement of the Theorem,
add the phrase "and passes through an interior point of the
triangle,"
after the phrase "triangle PQ/Omega" |
11-27-226 |
Wendy Weber |
| 291 |
(-5) |
Theorem 7.10 should start "Let
ABDC be a Lamert quadrilateral " |
6-19-2008 |
Scott Johnson |
| 297 |
11, 12 (Ex 7.5.11) |
Replace two occurences of
"equal" with "congruent" |
12-4-2005 |
Mike Hvidsten |
| 329 |
24 (-5) |
Replace "will map the disk to f" with "will map the disk to c" | 11-29-2004 |
Mike Hvidsten |
| 356 |
Last line |
Replace "Fig. 9.2" with
"Fig. 9.3" |
11-17-2006 |
Tami Kreykes |
| 372 |
2 |
Replace "valueof" with "value of" |
11-17-2006 |
Mike Hvidsten |
| 405 |
20 |
Repace "then DB < AB, DC <
AC" with "then DB+DC < AB+AC" |
2-21-2006 |
Rebecca Krakowski |
| 457 |
The index entries for "AAS" and
"ASA" should refer to page 64, not page 63. |
10-19-2006 |
Christa Stocks |