Предмет: Геометрия, автор: alla2vitka

четырехугольник ABCD описан вокруг окружности. AB=3, BC=5,CD=6. Найдите AD

Ответы

Автор ответа: dnepr1

Четырёхугольник является описанным тогда и только тогда, кода суммы его противолежащих сторон равны:a+c = b+d.
АД = 3 + 6 - 5 = 9 - 5 = 4.

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