Предмет: Геометрия, автор: belik32

8 пжжжж да 25 баллов

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Автор ответа: Аноним

Ответ:

Периметр треугольника ∆ADC равен 23см

Объяснение:

<ВАС=<САD, по условию.

<ВСА=<АСD, по условию.

АС- общая сторона.

∆АВС=∆АDC, по второму признаку.

В равных треугольниках соответственные стороны равны.

АВ=AD=9см

ВС=CD=3см.

Р∆АDC=AC+CD+AD=9+3+10=22см

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