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درونچرخهزاد.
درونچرخهزاد
درونچرخهزاد (به انگلیسی: hypotrochoid) در ریاضیاتی به منحنی غلتانی گفته میشود که توسط نقطهای ترسیم میشود که به دایرهای به شعاع r چسبیده و این دایره در درون یک دایره ثابت با شعاع R میغلتد در حالی که نقطهٔ مذکور در فاصلهٔ d از دایره درونی قرار گرفته باشد.
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