Предмет: Геометрия, автор: bessmertnyjeldar450

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Автор ответа: ahmedovanargiza090
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Ответ:

Объяснение:сумма односторонних углов равна 180°,=>180-77=103° угол В

Угол D=180°-144=36° угол D

Всё вместе 360°

77+103+144+36=360°

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