[N.B. These are taking for-ev-er to crank out, for whatever reason, so I’m changing the format a bit. If anybody misses the minute by minute breakdown, I’ll bring it back. I’m guessing it was only there for formality’s sake, though.]
- The area of circles and all their chopped-up, little parts.
- Famous Idiots in History
- The Stop Sign Project
- honey. Snapple Real Facts. They know what (-x,y), (x,-y) and (-x,-y) look like. These are (y,x). What would (-y,x) look like? (There are at least two answers for b, incidentally.)
- The Slate article: http://tinyurl.com/yvgfct
The US mint page: http://tinyurl.com/6cejq
- We all acknowledge that paper bills are the ideal heist. If you HAD to steal any coin, you’d want to steal dollar coins for value. But if you consider WEIGHT in the mix, are dollar coins still your best bet? After you decide, how much would 45,000 pounds of each be worth? What does a low rate mean?
- We’ve known area of a circle for awhile. I don’t really want to talk about the formula.
- Do you see the parallelogram
- We’ll make it clearer.
- Now do you see the parallelogram? Alright, what’s the height.
- The base is a little trickier discussion.
- So there it is.
- A basic example.
- Working backwards from the answer.
- 15 is a great question on what happens to the area of a circle when you double the radius.
- Show the three figures, give “doughnut” as a more realistic name. What does the area of each depend on?
- Homework: Determine the area of a stop sign in square inches.
Notes & Revisions:
- The Algebra proved more difficult for my kids than I anticipated.
- Notice that dimes, quarters, and half-dollars are all worth the same relative to their weight. That isn’t an accident.