Предмет: Геометрия, автор: verobero2017

В трикутник СDE вписано коло з центром в точці А. Знайдіть <С трикутника,
якщо zACD = 30 ДУЖЕ ТЕРМІНОВО ЗАРАЗ КР БЛАГАЮ ВАС...

Ответы

Автор ответа: Krifot

1

Ответ:

<CED = 1/2 <CAD.

<SDE = 1/2 <CAD.

<SEC = <SDE - <CED = 1/2 <CAD - 1/2 <CAD = 0°.

Отже, <С трикутника СDE дорівнює 180°

<SEC - <SED = 180° - 0° - 60° = 120°.

Объяснение:

verobero2017: спасибо

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