Предмет: Геометрия, автор: brain846

Сделай задание пожалуйста!!!

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Ответы

Автор ответа: zmeura1204

2

Ответ:
АD=7см

Решение:
АВ+СD=CB+AD
6+9=AD+8
AD=6+9-8
AD=7см

Автор ответа: ludmilaksenija2005

1

Объяснение:

В описанном четырехугольнике сумма противоположных сторон равна:

АD+BC=AB+DC

AD+8=6+9

AD=15-8=7 cм

Периметр Р=АD+DC+BC+AB

P=7+9+8+6=30 cм

Ответ : АD=7 cм ; Р=30 см

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