Предмет: Геометрия, автор: Аноним

ABCDA1B1C1D1 — куб. Найдите угол между прямыми: A1C1 и AB;

7x8: це ще потрібно?

Ответы

Автор ответа: 7x8

0

Ответ:

$45^o$

Объяснение:

A₁C₁ || AC - шуканий кут дорівнюватиме куту між АC і AB.

ΔАBC - рівнобедрений прямокутний трикутник

AB=BC - сторона куба

AC - діагоналі граней куба

∠ABC=90°

У рівнобедреному прямокутному трикутнику катет утворює з гіпотенузою кут 45°.

Приложения:

Аноним: дякую

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