Angles in a Triangle Sum to 180° | Euclid's Elements Book 1 Proposition 32

00:00 Preliminaries
01:00 Reading proposition
07:20 Cannon conversation
07:50 Predictions for the argument
09:30 I need a new monitor
12:00 Should I restart Bible playlist?
19:00 Oh no
21:00 Euclid was the George Floyd of Ancient Greece
24:00 The three philosophies of mathematics
27:00 My new blog (https://zxq9.com/archives/author/doctorajaykumar)
28:40 The point of QAnal and of this playlist
32:30 Back to work
33:55 When the argument clicks and thank you Norman Wildberger
35:35 Why the sum of interior angles in a convex polygon is 180*(number of sides) - 360 degrees
48:08 error that propagates but I catch later, sum should be 360 degrees
52:10 twice as many angles
54:00 Wildberger is clever
56:40 Finishing up
57:55 GeoGebra

(1) B + O - G = 0
(2) B + O + P = 180
(3) P + G = 180

(2) - (1) = (3)
(2) - (3) = (1)

Element page: https://mathcs.clarku.edu/~djoyce/java/elements/bookI/propI32.html
GeoGebra: https://www.geogebra.org/m/mnmstjm7

Wildberger algebraic topology: https://www.youtube.com/playlist?list=PL6763F57A61FE6FE8
Chromopill article: https://zxq9.com/archives/2067
articles: https://zxq9.com/archives/author/doctorajaykumar

Cannon discussion: https://odysee.com/@BigBlackCannon:8/siqa-2022-05-06-projective-versus-euclidean:b
Euclid Elements playlist: https://odysee.com/@DoctorAjayKumar/ee
Greek Math playlist: https://odysee.com/@DoctorAjayKumar/GreekMath
Euclid Elements website: https://mathcs.clarku.edu/~djoyce/java/elements/

Where to find me:

BitChute: https://www.bitchute.com/doctorajaykumar/
Blog: https://zxq9.com/archives/author/doctorajaykumar
Gab: https://gab.com/DoctorAjayKumar
GitLab: https://gitlab.com/DoctorAjayKumar
GeoGebra: https://www.geogebra.org/u/doctorajaykumar
Odysee (main): https://odysee.com/@DoctorAjayKumar
Odysee (podcast): https://odysee.com/@BigBlackCannon
Locals: https://orangepill.locals.com/
Minds: https://www.minds.com/doctorajaykumar/
Rumble (main): https://rumble.com/c/c-906055
Rumble (podcast): https://rumble.com/c/c-765395
Twitter: https://twitter.com/DoctorAjayKumar
YouTube: https://www.youtube.com/channel/UC3NOwTrjbil7yVghQgJ1mug
Website: http://orangepill.healthcare/