April 2021 0 11 Report
В треугольнике ABC AB=BC и BD-биссектриса. Найдите: 1) Угол BCA, если смежный угол при вершине A равен 130 градусов. 2) Периметр треугольника ABC, если AB=5см, а AD=2см. P.S. Оформление пожалуйста (дано, найти, решение) 
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