Сумма углов треугольника не всегда равна 180º #vertdider #veritasium

less than 1m read

·Nov 3, 2024

В плоской геометрии мы ожидаем, что в сумме углы треугольника без осечек дадут 180°. Но в сферической геометрии в сумме три угла дадут больше. Гиперболической и напротив, если сложить все углы треугольника, получим меньше 180°. В этом нет ничего удивительного.

Посмотрите на этот шарик. Представим, что это сфера. Нарисую здесь небольшой треугольник; он оказался практически на плоской поверхности, и сумма его углов составит, грубо говоря, 80°. Только если я нарисую очень большой треугольник, сумма углов поменяется из-за искривления поверхности, и мы, измерив их, получим больше 180°.

Safari Live - Day 214 | National Geographic

Pinstriping my Lotus Exige S240 for $7

View All

Effective | Vocabulary | Khan Academy

This one’s going to work like a charm, wordsmiths, because the word we’re featuring in this video is effective. Effective, it’s an adjective meaning successful, good at something. The etymology, the derivation of this word helps explain it, I think. Thre…

This Season On Valley of the Boom | National Geographic

Let’s try one with a little bigger smile. [rushing sound] [dial tone] [gagging] [dramatic sounds] [gun clicks] [horn honking] Oh my god. Shh. You see all that? It didn’t happen. [electronic music playing] Microsoft didn’t literally kill anyone. They were…

Proof for the meaning of Lagrange multipliers | Multivariable Calculus | Khan Academy

All right, so last video I showed you guys this really crazy fact. We have our usual setup here for this constrained optimization situation. We have a function we want to maximize, which I’m thinking of as revenues for some company; a constraint, which I’…

Confronting Kevin O’Leary | How He Spends $400 Million Dollars

By the end of the year, I’m writing off millions of dollars. That’s a mistake. I make money selling potatoes with people’s pictures on them. It’s a huge hit. You’re dead to me, and you are because I’m out. What’s up, you guys? It’s Graham here. So, as so…

5 ways to avoid taxes...legally

What’s up, you guys? It’s Graham here. So, the time is fast approaching, and that would be the dreaded April 15th tax deadline. This is the deadline for filing your tax return and submitting any payment you might owe to the IRS or to the state. I get it;…

Announcing ThinkerCon! - A Celebration of Online Educational Content

Announcing ThinkerCon! Remember several years ago, five of us educational content creators got together, and we did this live event. It was really fun, but people came from like 40 states and 12 different nations for it. So, clearly, there’s a lot of dema…

Сумма углов треугольника не всегда равна 180º #vertdider #veritasium

More Articles