10．已知正四面体内接于半径为r的球用一平面去截此正四面体和球其截面如图则球心到截面的距离为 a． B． C． D．——青夏教育精英家教�—— Sketch Coloring Page

10．已知正四面体内接于半径为r的球用一平面去截此正四面体和球其截面如图则球心到截面的距离为 a． B． C． D．——青夏教育精英家教�—— Template

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tomski10．已知正四面体内接于半径为r的球用一平面去截此正四面体和球其截面如图则球心到截面的距离为 a． b． coloring

10．已知正四面体内接于半径为R的球用一平面去截此正四面体和球其截面如图则球心到截面的距离为 A． B． C． D．——青夏教育精英家教�—— sketch template

正四面体ABCD内接于半径为R的球O（即四个顶点在球面上），其内切球半径为r，（1）证明R＝3r （2）用R表百度知道 sketch template

深入浅出数学系列立体几何（4）：球的切接问题（上）知乎 sketch template

四面体外接球半径公式杂谈知乎 sketch template

求棱长为a的正四面体的外接球和内切球的半径 解析如图作AH⊥底面BCD于H则AH＝a设内切球的球心为O半径为rO点与ABC sketch template

已知半径为3的球内有一个内接正方体即正方体的顶点都在球面上．1求此球的体积2求此球的内接正方体的体积3求此球的表面积与其内 sketch template

三棱锥外接球半径公式 sketch template

浅谈圆内接对角线垂直四边形知乎 sketch template

已知正三角形ABC的三个顶点都在半径为2的球面上，球心O到平面ABC的距离为1，E是线段AB的中点，过点E作球O的截面，则A三棱锥O sketch template

正四棱锥的顶点都在同一球面上若该棱锥的高为4底面边长为2则该球的表面积为A．B．C．D．题目和参考答案——青夏教育精英家教�—— sketch template

已知四棱锥P ABCD的底面是边长为a的正方形所有侧棱长相等且等于a若其外接球的半径为R则aR等于．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

正四面体边长2a，外接球半径和内切球半径分别是多�？百度教育 sketch template

15．一个半径为的球中有一个各棱长都相等的内接正三棱柱则 此三棱柱的棱长为 ．——青夏教育精英家教�—— sketch template

5．平面截球所得到的截面是圆圆心与球心的连线垂直于截面截面圆的半径圆心与球心的连线段球的半径所构成的直角三角形是解决球的截面问题的 sketch template

正四棱锥的底面在球O的大圆面上顶点在球面上已知球的体积为则正四棱锥的体积的最大值为 ——青夏教育精英家教�—— sketch template

16．如图棱长为3的正三棱柱内接于球O中则球O的表面积为 ——青夏教育精英家教�—— sketch template

�已知正三角形的边长为a，其内切圆的半径为r，外接圆的半径为R，r：a：R= ；�已知正方形的边长为a 百度知道 sketch template

已知球的直径为10cm求它的内接圆锥体积的最大值并求出此时圆锥的底面半径和高．题目和参考答案——青夏教育精英家教�—— sketch template

如图半径为4的球O中有一内接圆柱当圆柱的面积最大时球的表面积与圆柱的侧面积之差是 ——青夏教育精英家教�—— sketch template

初中数学，掌握好四点共圆的性质可以使复杂的题目变得简单易解知乎 sketch template

初中数学，掌握好四点共圆的性质可以使复杂的题目变得简单易解知乎 sketch template

用两种方法证明“圆的内接四边形对角互补”．已知：如图�，四边形ABCD内接于⊙O．求证：∠B＋∠D＝180°．证法1：如图�，作直径DE交⊙ sketch template

已知正方形内最大的圆与以正方形边长为半径的扇形相交，求阴影部分面积。跪求答案，谢谢高手！百度知道 sketch template

用两种方法证明“圆的内接四边形对角互补”已知：如图�，四边形ABCD内接于⊙ O求证：∠ B ∠ D=180°证法1：如图�，作直径DE sketch template

半径为R的圆的内接正n边形的面积等于．题目和参考答案——青夏教育精英家教�—— sketch template

正多边形的画法步骤图 数学英才学习� sketch template

用两种方法证明“圆的内接四边形对角互补”．已知：如图�，四边形ABCD内接于⊙O．求证：∠B＋∠D＝180°．证法1：如图�，作直径DE交⊙ sketch template

把四个半径都是1的球中的三个放在桌面上使它两两外切然后在它们上面放上第四个球使它与前三个都相切求第四个球的最高点与桌面的距离．题目和 sketch template

如图正三棱锥ABCD内接于球O底面边长为3侧棱长为2则球O的表面积为 A64π3B32π3C16π3D8π3 题目和参考 sketch template

内接于半圆的正方形面积与内接于这个圆的正方形的面积之比为A．12 B．23 C．25 D．34——青夏教育精英家教�—— sketch template

百度教育 sketch template

如图7正六边形内接于⊙⊙的半径为4则圆中阴影部分的面积为 ．——青夏教育精英家教�—— sketch template

已知圆的半径为求圆内等边三角形的边长百度教育 sketch template

如图正六边形与正十二边形内接于同一圆⊙O中已知外接圆的半径为2则阴影部分面积为 ——青夏教育精英家教�—— sketch template

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