Предмет: Геометрия, автор: zefirka2007rn

Дано угол АBD=УГОЛ CBD,BD _I AC

Докажи:угол BAD=УГОЛ BCD

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Ответы

Автор ответа: elenakolesnik04

19

Ответ:

Доказательство:

рассм. углы бад и бцд

BC=BA

AD=CD

BD-общая сторона⇒

⇒ BAD=BCD(по 3 сторонам)

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