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- به چندضلعیهایی که حداقل یک زاویه بزرگتر از ۱۸۰ دارند، چند ضلعی مقعر میگویند. چندضلعی مقعر با عنوان چند ضلعی کاو نیز شناخته میشود. چند نمونه چند ضلعی مقعررا میتوانید در تصویر زیر مشاهده کنید. تمام چندضلعیهای بالا، حداقل یک زاویه بزرگتر از ۱۸۰ درجه دارند. در ادامه، نحوه تشخیص این زاویهها و تعیین مقعر بودن چندضلعیها را آموزش میدهیم.
- : 4.8/5
- : Feb 21, 2022
مقعر - ویکیپدیا، دانشنامهٔ آزاد
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تابع کاو یا تابع مقعّر تابعی است که اگر دو نقطهٔ دلخواه و از این تابع را در نظر بگیریم، خط همواره زیر تابع یا همسطح آن قرار بگیرد. به بیان ریاضی: اگر در این نابرابری، علامت ≤ را با علامت <جایگزین کنیم، تعریف تابع اکیداً کاو به دست میآید. با توجه به تعریف هر خط راستی هم نمایانگر یک تابع کوژ و هم نمایانگر یک تابع کاو است.
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