Errata for Henderson/Taimina, Experiencing Geometry (3^rd edition)

Changes in Red.

 

pg xix, line 23:  “George_Lobell@prenhall.com or calling 1-201-236-7407.”  should be changed to “Nicole_Kunzmann@prenhall.com  or  calling  1-201-236-7739.”

 

pg 13, line 12-:

out using its center. When the lengths g and f are equal, then Q draws the

 

pg 106, equation in Part c-:

replace "(n - 1)" with "(n - 2)"

 

pg 114, line 11:

any transversal passing through the midpoint of the segment of l

 

pg 115, line 18:

2.  Parallel lines are lines such that every transversal cuts them at

 

pg 134, Figure 10.6:  Remove the three d’s along the bottom of the figure (leave the three d’s near the top.

 

pg 147, line 2-:  this one is not important

some students have affectionately called them “horrorcycles.”] Note that

 

pg 181, line 4-:

which we will prove in Problem 15.1a, but the special case we need is

 

pg 196, line 2:

use that result to show that ac = bd or, in equivalent form, a/d = b/c.

 

pg 198, line 8:

need properties of similar triangles that are investigated in Problem 13.4.

 

pg 259, Figure 18.15: 

Switch the direction of both sides of the octagon that are marked with four arrows.

 

pg 271, line2 (just below Figure 19.3):

This leads to x = b/2 − . Note that if c > (b/2)², this geometric

 

pg 387:  Remove “59, ” from the “Gauss” entry, which should now read:
            Gauss, 103, 140, 142, 226, 347

 

pg 390:  Poincaré, 258, 354

                        Conjecture, 257-8

                        disk model. 212, 234, 242-3

 

            projective disk model, 234, 244

 

Errata for Henderson/Taimina, Experiencing Geometry (3^rd edition)

Instructor’s Manual

Changes in Red.

 

pg 13, Figure 7: The points C, P, and D should be labeled as follows:

The piont "C" is where the two links of length s intersect.

The point "P" is where the link of length f intersects two links of length d.

The point "D" is the other end of the link of length f.

 

pg 93, equation in Part c-:

replace "(n - 1)" with "(n - 2)"

 

pg 106, line 3:

      they are also parallel transports along any transversal passing through the midpoint of the

 

pg 108, line 13:

     2.  Parallel lines are lines such that every transversal cuts them at congruent angles: or

 

pg 138, at the end of the first paragraph add:

     Draw in the two diagonals and first use SAS and then SSS.

 

pg 147, Figure 10.6:  Remove the three d’s along the bottom of the figure (leave the three d’s near the top.

 

pg 159, line 2:  this one is not important

     called them “horrorcycles.”] Note that on the plane circles of infinite radius are straight lines.

 

pg 201, line 8:

     that we will prove in Problem 15.1a, but the special case we need is easy to see now. In particular

 

pg 213, last five lines:

Now, if θ = π/2, then the above equal areas are the products ac = bd, and cross-dividing we

get the desired a/d = b/c. Then we can define the usual trigonometric functions for right

triangles. For arbitrary θ the above equal areas are ac sinθ = bd sinθ, so again cross-dividing, we

get:

a/d=b/c.

 

pg 215, line 5-:

triangles that are investigated in Problem 13.4.

 

pg 275, Figure 18.15:  Switch the direction of both sides of the octagon that are marked with four arrows.

 

pg 287, line 1 (just below Figure 19.3):

     This leads to x = b/2 − . Note that if c > (b/2)², then this geometric solution is impossi-