Предмет: Геометрия, автор: bazarovdaler

четырёхугольник ABCD описан около окружности найти стороны BC и AD если АВ=7 см CD=11 см ВС в 2 раза меньше AD

Ответы

Автор ответа: Vikabx

В четырехугольник можно вписать окружность тогда, когда сумма длин противоположных сторон равны, следовательно
AB+ CD= BC+ AD
AD =2BC
7+11=3BC
BC=6
AD=12

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