This week, we covered 7-1 through 7-4. I understood most of this weeks lessons, however, 7-3 bothered me the most. It wasn't that it was hard or anything, it was that it was a lot of work. Although, I learned that if we memorized the Pythagorean Triples, it would be easy to solve them.
-- some examples of Pythagorean Triples:
-3,4,5
-5,12,15
-7,24,25
-8,15,17
-9,40,41
-11,60,61
-12,35,37
-13,84,85
I also had trouble with parts of 7-1. Converting from radians to degrees and degrees to radians was very easy.
rads-degrees: x 180/pi degrees-rads: x pi/180
The main thing in 7-1 I did not understand was finding coterminal angles when it was in radians, but now I know that all you do is subtract 2pi from the rad and you get your answer.
7-2 was my favorite lesson because it was the lesson I understood the most. the formulas...:
-s=r0 -k=1/2 r^2 0 -k=1/2 rs
--s=arc length r=radius 0=central angle k=area of a sector
...were very easy to understand and plugging in the numbers were quick and easy.
7-4 was easy to understand but having to look into the trig chart to check for the angle got old very quick.
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