两个相同的正四棱锥底面重合组成一个八面体可放于棱长为1的正方体中重合的底面与正方体的某一个面平行各顶点均在正方体的表面上把满足上述条件 Sketch Coloring Page

两个相同的正四棱锥底面重合组成一个八面体可放于棱长为1的正方体中重合的底面与正方体的某一个面平行各顶点均在正方体的表面上把满足上述条件 Template

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tomski两个相同的正四棱锥底面重合组成一个八面体可放于棱长为1的正方体中重合的底面与正方体的某一个面平行各顶点均在正方体的表面上把满足上述条件 coloring

两个相同的正四棱锥底面重合组成一个八面体可放于棱长为1的正方体中重合的底面与正方体的某一个面平行各顶点均在正方体的表面上把满足上述条件 sketch template

两相同的正四棱锥组成如图所示的几何体可放棱长为1的正方体内使正四棱锥的底面ABCD与正方体的某一个平面平行且各顶点均在正方体的面上则 sketch template

正四棱锥图册 360百� sketch template

已知正三棱锥P－ABC的底面边长为6，其内切球的半径为1，则此三棱锥的高为． sketch template

$底面边长和侧棱长均为2的正四棱锥的体积为$frac{4sqrt{2}}{3}$．题目和参考答案——青夏教育精英家教�—— sketch template$

2020 10 20 立体几何 四棱锥里找截面知乎 sketch template

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14．已知正四棱锥P ABCD的高为4侧棱与底面所成的角为600则该正四棱锥的侧面积是．——青夏教育精英家教�—— sketch template

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已知在四棱锥中，底面为正方形，侧棱平面，点为中点，高途 sketch template

初学讲义之高中数学二十：简单几何体 知乎 sketch template

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正三棱锥 知乎 sketch template

81 基本立体图形1 棱柱、棱锥、棱台湛江贵哥讲数学博客园 sketch template

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20．（12分）如图，四棱锥P ABCD的底面为正方形，PD⊥底面ABCD．设平面PAD与平面PBC的交线为l．（1）证明：l⊥平面PDC sketch template

正四棱锥P ABCD中PA=AB=2则该四棱锥外接球的表面积为8π．题目和参考答案——青夏教育精英家教�—— sketch template

正三棱锥的高为1，底面边长为2√6，内有一个球与它的四个面都相切，求：三棱锥的表面积．内切球的半径．百度教育 sketch template

18．如图所示在四棱锥P ABCD中底面ABCD是一直角梯形∠BAD=90° AD∥BC AB = BC A AD 2a sketch template

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如图已知四棱锥P ABCDPA⊥平面ABCD底面ABCD为直角梯形∠A=90°且AB//CDAB=CD 1点F在线段PC上运动 sketch template

如图所示在四棱锥S ABCD中底面ABCD是正方形侧棱SD⊥平面ABCDSD=DC点E是SC的中点作EF⊥SB交SB于点F．1 sketch template

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14= 15如图四棱柱ABCD―A1B1C1D1的底面ABCD为正方形侧棱与底面边长均为2a——青夏教育精英家教�—— sketch template

有一个正六棱锥底面为正六边形侧面为全等的等腰三角形的棱锥底面边长为3cm高为3cm画出这个正六棱锥的直观图．题目和参考答案——青 sketch template

四棱锥的底面是矩形，顶点在底面内的射影是矩形对角线的交点，且四棱锥及其三视图如下（垂直于主视图投影平面）．则四棱锥的侧面积是 sketch template

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