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Caption=Дослідіть суму протилежних кутів чотирикутника,~~вписаного в коло.
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[Label3]
Caption=Спостерігайте за величинами кутів чотирикутника~~під час зміни положення його вершин.~~Сформулюйте гіпотезу щодо ~~суми протилежних кутів чотирикутника,~~вписаного в коло.~~Доведіть гіпотезу дедуктивно.~~~~~~
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[Label4]
Caption=Кут DAB = [Angle(D,A,B)°]°~~Кут BCD = [Angle(B,C,D)°]°~~~~Кут ABC = [Angle(A,B,C)°]°~~Кут ADC = [Angle(A,D,C)°]°~~
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