Math 2 Changes for 2009-2010

09#09 removed extra "a"
13#07 replaced PQR by TUV.
15#02 changed "diameter" to "radius".
15#07 has new data, as usual.
16#10 changed "particle" to "object".
restructured page 18 --- four proofs and now three questions.
19#06 moved line up 1 unit.
19#11 moved to 18#3.
22#06 split into two questions, to avoid the need to parse "only if".
22#11 new; precursor to 25#01.
23#06 new starting coordinates for Jordan.
30#12 used to be 30#02; the numbers now match 30#01.
42#13 inserted a sixth quadrilateral (a non-isosceles trapezoid).
43#03 removed "continuation".
assigned a number to the only question on page 45.
51#05 removed "actual".
54#11 added a second part, which needs a careful treatment.
55#06 clarified what "four" means. 
57#01 changed the triangles in part a.
59#01 changed the second line (the yz-projections are no longer parallel).
60#10 replaced by the old 61#04.
61#04 new; acknowledges the viability of the three inverse trig functions.
62#06 clarified which length goes on top.
62#10 reworded.
63#08 clarified which area goes on top.
68#11 reworded, to get rid of "compass bearing".
68#12 reworded to get rid of the "largest" distractor.
69#06 requested an equation (off-center) for one of the circles.
71#02 new numerical data.
73#03 new computational problem (proof version deferred to math 3).
76#11 was brought in from page 54 of math 3, while 
      old questions
76#06 and 
76#12 have been combined into 59#6 in the new math 3.
78#06 is now 61#13 in the new math 3.
79#01 is now 63#11 in the new math 3.
79#02 is now 64#13 in the new math 3.

reference section:
added "Alex in the desert", "foot", "lens", and "regular pyramid".