Friday, February 13, 2009

(This should have been up a week ago, but stuff happens. . . . )

Today, there was a basketball tournament, and some of the class stayed behind while others went to see the game. There wasn’t any new material introduced today, so that saves me the headache of having to put up more material. ;-)

Today (one week ago) Mr. Max showed us a really cool program called graphimatica (which is probably a spinoff of the famous “Mathematica”). We also learned about angles of rotation and the two types of angels: supplementary angles (angles add up to 180 degrees) and complimentary angles (angles that add up to 90 degrees), and arcs.























We can take make graphimatica export a clean image showing us our graphed lines:

Now, on to the angles of rotation. When the terminal arm rotates clockwise, it is negative, and when the arm rotates counter clockwise, it is positive:

To measure the total rotation, we use the terminal and the initial arm. We measure the amount of rotations by starting at the initial arm and ending at the terminal arm:

A supplementary angle is 180 degrees and a complementary angle is 90 degrees:

And onto the arcs:

Have a great long weekend!

And here are some links that might be of interest for some extra math stuff:

www.cemc.uwaterloo.ca
www.artofproblemsolving.com