Предмет: Геометрия, автор: bondarenko2028

Чотирикутник ABCD вписано в коло. Кут А дорівнює 20°, Кут В дорівнює 100°. Знайдіть кути С і D цього чотирикутника.

Ответы

Автор ответа: vgvhvhbv

Ответ:

<А+<D= 180°,тому <D=180°-<A=180°-20°=160°

<B+<C=180°, тому <C=180°-<B=180°-100°=80°

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