【摘要】 本文用定积分的元素法 ,归纳出含有内切圆的多边形的面积与周长间、含内切球的几何体的体积与表面积间的微积分关系 ,并给出计算旋转体体积的一般公式更多还原

【Abstract】 This paper,applying the element analysis of definite integral, has induced an algorithm of infinitesimal to value the ratio between the perimeter of a polygon and the area of the polygon with an inscribed circle, the ratio between the surface of a geometric body and the volume of the geometric body with an inscribed sphere.The paper has also offered a formula of the volume of a rotator.更多还原