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Непрерывное математическое образование | United States America (US)
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На картинке — планиметр, прибор для измерения площадей. Один конец закрепляется на бумаге, другим обводят контур фигуры — и планиметр чисто механически вычисляет ее площадь.

Если думать про площадь в терминах… клеточек, которые занимает фигура или каких-то подобных, то это кажется довольно удивительным. Можно сказать, что это механическая реализация математики формулы Грина.

Это все тема несколько забытая, но какие-то тексты в интернете можно найти (1) (2) (3) (4)

Непрерывное математическое образование
Непрерывное математическое образование
знаете такое устройство?.. (подробности — в понедельник)
На картинке — планиметр, прибор для измерения площадей. Один конец закрепляется на бумаге, другим обводят контур фигуры — и планиметр чисто механически вычисляет ее площадь.

Если думать про площадь в терминах… клеточек, которые занимает фигура или каких-то подобных, то это кажется довольно удивительным. Можно сказать, что это механическая реализация математики формулы Грина.

Это все тема несколько забытая, но какие-то тексты в интернете можно найти (1) (2) (3) (4)
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Непрерывное математическое образование





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NEWS: Telegram supports Facetime video calls NOW!

Secure video calling is in high demand. As an alternative to Zoom, many people are using end-to-end encrypted apps such as WhatsApp, FaceTime or Signal to speak to friends and family face-to-face since coronavirus lockdowns started to take place across the world. There’s another option—secure communications app Telegram just added video calling to its feature set, available on both iOS and Android. The new feature is also super secure—like Signal and WhatsApp and unlike Zoom (yet), video calls will be end-to-end encrypted.

На картинке — планиметр

Непрерывное математическое образование TG
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