Metamath Proof Explorer
Table of Contents - 16.2.12. Right angles
- crag
- df-rag
- cperpg
- df-perpg
- israg
- ragcom
- ragcol
- ragmir
- mirrag
- ragtrivb
- ragflat2
- ragflat
- ragtriva
- ragflat3
- ragcgr
- motrag
- ragncol
- perpln1
- perpln2
- isperp
- perpcom
- perpneq
- isperp2
- isperp2d
- ragperp
- footexALT
- footexlem1
- footexlem2
- footex
- foot
- footne
- footeq
- hlperpnel
- perprag
- perpdragALT
- perpdrag
- colperp
- colperpexlem1
- colperpexlem2
- colperpexlem3
- colperpex
- mideulem2
- opphllem
- mideulem
- midex
- mideu