July 2022 1 21 Report
Отрезки АС и ВD пересекаются в точке О. ВD= АС, ОВ=ОС. а)Докажите, что ∆ АОВ = ∆ СОD; б)Найдите периметр ∆ СОD, если АВ=9см, ВО=5см, ОD=7см.
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