研磨自：[url=https://www.bilibili.com/video/BV1ET411w7kf/?spm_id_from=autoNext&vd_source=edcad05029f6d4b15eaba8a422397416]【GGB教学】（指令）折线图3-绘制正多边形曲线_哔哩哔哩_bilibili[br][/url][br][url=https://www.bilibili.com/video/BV1EB4y1Y7Pi/?spm_id_from=333.788.recommend_more_video.4]【GGB指令】（曲线）正多边形的参数曲线指令的推导_哔哩哔哩_bilibili[/url]