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Caption=Які кути утворює хорда АВ,~~що дорівнює радіусу кола, ~~з дотичною до цього кола в точці А?
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Caption=Точка А; ~~точка О; ~~радіус даного кола R
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Caption=1. Рухаючи точку А, дослідіть ~~    величину кута ВАС.~~2. Чи зміниться градусна міра кута ВАС ~~    при різних значеннях радіуса ~~    даного кола?~~3. Доведіть отриманий результат.
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Caption=1. Дано коло. Побудуйте хорду ~~    даної довжини. Запишіть макрос побудови.~~2. Запишіть макрос побудови ~~    дотичної до кола в точці на колі.~~3. Зробіть власне креслення і розв'яжіть ~~    за ним дану задачу.
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