Contact us
Choose a category below so we can get back to you as quickly as possible.
作AB中點D,連結PD、CD因為PA=PB,AC=BC所以AB⊥PD,AB⊥CD則AB⊥平面PCD由PC在平面PCD內得AB⊥PC因為E F分別是側棱PB,BC中點,所以EF//PC又AE⊥EF,所以AE⊥PC因為AE和AB是平面PAB內的兩條相交直線所以PC⊥平面PAB則PC⊥…
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.