- Geometry homework is "technically" due. Let's extend the deadline until Tuesday.
- For next time: Please read Fit the Sixth. Write your own couplet using the process of "Memoria Technica" for next time (see p. 136/137), and email in advance (if possible).
- Sorry -- I've not finished grading your clock homework
- Together:
- We'll resume our proof of the asses' bridge (p. 84), Proposition
I.5. What can we assume?
- Postulates, definitions, common notions
- Proposition I.4 (side-angle-side)
- Proof of the Pythagorean Theorem (p. 82)
- Euclid's proof (Proposition I.47)
- We'll do an easier proof than that! But first
we'll construct a perfect diagram:
- We'll resume our proof of the asses' bridge (p. 84), Proposition
I.5. What can we assume?
- The Euclid Debate: "De Morgan raised the question whether
Euclid be, as many suppose, the best elementary
treatise on geometry, or whether it be a mockery,
delusion, snare, hindrance, pitfall, shoal, shallow,
and snake in the grass." -- An Anti-Euclid Association
was formed....
- Dodgson ably defended Euclid, but could not triumph over all the
arrayed forces. What's Dodgson's point in the Minos sketch on
page 93?
- What do you think of Dodgson's approach to attacking circle squarers?
- What's new with Dodgson?
- At work
- At "play" (let's translate the Puzzle letter, p. 106)
- "At church"
- What are some of the mathematical elements?
- Is 2+2=5? Impossible!
- Can you believe the impossible thing on p. 116?
- Example of the use of determinants:
- Eggs and Apples
- Eggplant and Alligators