...关系式D=2r轻松计算半径。确定半径后,使用上述公式。 如何求球体的体积:示例 球体的半径是10厘米。球体的体积是多少? 半径是给定的。因此,球体的体积可以计算如下:, 如何求半球体的体积:例子 一个直径为5米的...
...。如果顶点从基部中心偏移,则圆锥体称为斜圆锥体。 如何求圆锥体的体积 对于底面半径为r,高度为h的圆锥体,其体积可通过以下公式得出:, 结果适用于斜锥和右锥。结果如下(在这种情况下,只考虑右锥体,斜锥体的...
...常数,a≠x的所有值均为0。二次函数的图形是抛物线。 如何求二次函数的对称轴 任何二次函数在y轴或平行于y轴的直线上显示横向对称性。二次函数的对称轴如下: f(x)=ax2+bx+c,其中a,b,c,x∈R和a≠0 把x项写成一个正方形...
双曲线 The hyperbola is a conic section. The term hyperbola is referred to the two disconnected curves shown in the figure. 如果主轴与笛卡尔轴重合,双曲线的一般方程为: 这些双曲线围绕y轴对称,称为y轴双曲线。绕x轴对称的双曲线(或x轴双...
...中棱柱体的边的长度为l,h是三角形与边a的垂直高度。 如何求棱镜的表面积:示例 棱镜的横截面积为3厘米长的等边三角形。如果棱镜长10厘米,则求出棱镜的总面积。 找到基地的面积 底座为3cm等边三角形。因此,三角形...
...角形 9 九边形 10 十边形 11 亨德卡贡 12 十二边形 如何找到多边形的面积:方法 The area of a general irregular polygon cannot be acquired directly from the formula. However, we can separate the polygon into **aller polyg***, with which we can easily calculate the ...
...ction perpendicular to the plane containing both and . Geometrically, the magnitude of the cross product of two vectors is equal to the area of a parallelogram with and as adjacent sides. Vectors , and for a right-handed system as follows: 叉积具有以下代数性质。 以下结果也适...
...体、棱柱体和棱锥体是几何中的三种基本实体,因此了解如何求立方体、棱柱体和棱锥体的体积是至关重要的。在数学、物理科学和工程中,这些物体的性质非常重要。大多数情况下,更复杂物体的几何和物理性质总是用实体物...
...算位移量 As mentioned earlier, displacement is a vector quantity. The magnitude (size) of this vector quantity gives the distance. If the displacement vector , then the magnitude is given by . In the earlier example, we had a displacement vector of . The magnitude of this vector is ....
... length of by a factor . If , then, in addition to increasing the magnitude of by a factor , the direction of the vector would also be reversed. With regards to vector components, each component gets multiplied by the scalar. For instance, if a vector , then . 例子 The momentum ...