几何体的截面把“面”和“体”联系起来,使同学们在面与体的转换巾丰富数学活动经验,有助于同学们发展空间观念,大家在平时的学习中要注意做到以下四个方面.一、会识别平面截几何体所得的平面图形例1如图1,一个垂直于圆锥底面的平面经过圆锥的顶点截圆锥所得的截面形状是(). The cross-section of the geometry links the “face” and the “body” so that the students can enrich the experience of the mathematics activities in the face-to-face transformation and help the students to develop the concept of space. Everyone should pay attention to the study in peacetime. Do the following four aspects. First, will recognize the flat plane truncated geometry obtained by the plane Figure 1 in Figure 1, a plane perpendicular to the conical bottom surface through the cone apex truncated cone obtained by the cross-sectional shape is ().