Forgot password
 Register account
View 127|Reply 0

[几何] 立体几何中动点问题

[Copy link]

168

Threads

382

Posts

5

Reputation

Show all posts

lrh2006 posted 2022-11-26 10:49 |Read mode
Last edited by hbghlyj 2025-3-9 01:21(多选题) 如图,等腰直角△ABC中,AC=CB,点P为平面ABC外一动点,
满足PB=AB=2,$ \angle PBA=\frac{\pi}{2}$,则存在点P使得( )
A. $AB\perp PC$     
B. PB与平面PAC所成角为$\frac{\pi}{4}$
C. $PC=\frac{16}{5}$
D. 二面角P-AC-B的大小为$\frac{\pi}{3}$

Quick Reply

Advanced Mode
B Color Image Link Quote Code Smilies
You have to log in before you can reply Login | Register account

$\LaTeX$ formula tutorial

Mobile version

2025-6-8 12:15 GMT+8

Powered by Discuz!

Processed in 0.088283 second(s), 26 queries

× Quick Reply To Top Edit