Page 51


Problem 1


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Problem 2




Problem 3


(a) [x-2, y-5, z+6] (b) [-3, 4-2t, -3+t]



Problem 4


This is just one example of a point. You should try to find others.

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Problem 6


My hint: Brett and Jordan arrive at the intersection point exactly one second apart. Guess and check to find out the times.



Problem 8


An application of the angle bisector theorem. Side BC is divided into two parts in a 4:6 ratio, or 4 parts to 6 parts. In other words, side BC is divided into 10 parts, with 4 parts being assigned to BD and 6 parts being assigned to DC.





Problem 9


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Problem 10


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Problem 11


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Problem 12




3, 4, 5, 6, 8, 9, 10, 12,... and the other divisors of 360.





Page 52


Problem 1


The only question this begs is how fast must Alex drive in the desert to make the driving thro]ugh the desert the shortest time path?
You should try to answer this.

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03-03-2011_Image001.jpg

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Problem 2


Great review of special right triangles, medians, and centroid!

2011-03-03_0003.jpg]----===Problem



Problem 4


A great application of special right triangles and similar triangles

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Problem 9






Problem 8







Problem 12


There was an applet illustrating this a couple of pages back. Look for it if you want to see it.