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# ???? - PowerPoint PPT Presentation

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## PowerPoint Slideshow about '????' - haruko

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Presentation Transcript

2

3

1

F

b

M

a

E

n

1.点点距

2.点线距

3.线线距

4.点面距

5.线面距

6.面面距

7.球面距

B

P

M

M

,F（4，2，0）

E（2，0，0）

,

G（0，4，2）

G

z

D

y

C

E

A

B

F

x

2

z

y

x

(1)找出或作出相应的线段

(2)证明此线段符合定义

(3)归结到某三角形计算长度

• “等积法”求距离

• (1)设所求距离为d

• (2)所求是“点到线”距离用“等面积”

• (3)所求是“点到面”距离用“等体积”

• “转化法”求距离

• 不断地进行点面、线面、面面距离之间转化

z

y

x