Предмет: Геометрия, автор: oksanasulica705

У чотирикутнику ABCD AB=10см, BC=8см,CD=7см. Якої довжини має бути сторона AD, щоб цей чотирикутник можна було описати навколо кола

Ответы

Автор ответа: ludmilaksenija2005

0

Объяснение:

в четырехугольник можно вписать окружность только тогда ,когда он выпуклый и суммы противоположных сторон равны

АВ+СD=AD+BC

10+7=AD+8

17=AD+8

AD=17-8=9 см

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