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一、圆柱和圆锥的特征1.圆柱(1)底面:圆柱有两个底面,并且上、下两个底面是面积相等的圆。(2)高:圆柱体两个底面之间的距离叫作圆柱的高。(3)侧面:圆柱的侧面展开是一个长方形或正方形。2.圆锥(1)底面:圆锥只有一个底面,底面是一个圆。(2)高:圆锥的高是从顶点到底面圆心之间的距离。(3)侧面:圆锥的侧面展开是一个扇形。二、基本公式圆柱的侧面积指的是除了两个底面积之外的面积。圆柱侧面积的计算公式是S=Ch。
First, the cylindrical and conical features 1. Cylindrical (1) Bottom: Cylindrical has two bottom, and the upper and lower two bottom is the same area of the circle. (2) high: the distance between the two bottom surfaces of the cylinder is called the height of the cylinder. (3) side: the side of the cylinder is a rectangular or square expansion. 2. Cone (1) Bottom: Cone only one bottom, the bottom is a circle. (2) high: the height of the cone is the distance from the apex to the center of the bottom surface. (3) side: the side of the cone is a fan-shaped expansion. Second, the basic formula Cylindrical side area refers to the area other than the two bottom area. The formula for calculating the area of the cylinder is S = Ch.