Theorem perpdragALT 25619

Description: Deduce a right angle from perpendicular lines. (Contributed by Thierry Arnoux, 12-Dec-2019.) (New usage is discouraged.) (Proof modification is discouraged.)

Hypotheses

Ref	Expression
colperpex.p	|- P = ( Base ` G )
colperpex.d	|- .- = ( dist ` G )
colperpex.i	|- I = (Itv ` G )
colperpex.l	|- L = (LineG ` G )
colperpex.g	|- ( ph -> G e. TarskiG )
perpdrag.1	|- ( ph -> A e. D )
perpdrag.2	|- ( ph -> B e. D )
perpdrag.3	|- ( ph -> C e. P )
perpdrag.4	|- ( ph -> D (⟂G ` G ) ( B L C ) )

Assertion

Ref	Expression
perpdragALT	|- ( ph -> <" A B C "> e. (∟G ` G ) )

Proof of Theorem perpdragALT

Step	Hyp	Ref	Expression
1		eqidd 2623	. . . 4 |- ( ( ph /\ A = B ) -> A = A )
2		simpr 477	. . . 4 |- ( ( ph /\ A = B ) -> A = B )
3		eqidd 2623	. . . 4 |- ( ( ph /\ A = B ) -> C = C )
4	1, 2, 3	s3eqd 13609	. . 3 |- ( ( ph /\ A = B ) -> <" A A C "> = <" A B C "> )
5		colperpex.p	. . . . 5 |- P = ( Base ` G )
6		colperpex.d	. . . . 5 |- .- = ( dist ` G )
7		colperpex.i	. . . . 5 |- I = (Itv ` G )
8		colperpex.l	. . . . 5 |- L = (LineG ` G )
9		eqid 2622	. . . . 5 |- (pInvG ` G ) = (pInvG ` G )
10		colperpex.g	. . . . 5 |- ( ph -> G e. TarskiG )
11		perpdrag.3	. . . . 5 |- ( ph -> C e. P )
12		perpdrag.4	. . . . . . 7 |- ( ph -> D (⟂G ` G ) ( B L C ) )
13	8, 10, 12	perpln1 25605	. . . . . 6 |- ( ph -> D e. ran L )
14		perpdrag.1	. . . . . 6 |- ( ph -> A e. D )
15	5, 8, 7, 10, 13, 14	tglnpt 25444	. . . . 5 |- ( ph -> A e. P )
16	5, 6, 7, 8, 9, 10, 11, 15, 11	ragtrivb 25597	. . . . 5 |- ( ph -> <" C A A "> e. (∟G ` G ) )
17	5, 6, 7, 8, 9, 10, 11, 15, 15, 16	ragcom 25593	. . . 4 |- ( ph -> <" A A C "> e. (∟G ` G ) )
18	17	adantr 481	. . 3 |- ( ( ph /\ A = B ) -> <" A A C "> e. (∟G ` G ) )
19	4, 18	eqeltrrd 2702	. 2 |- ( ( ph /\ A = B ) -> <" A B C "> e. (∟G ` G ) )
20	10	adantr 481	. . 3 |- ( ( ph /\ A =/= B ) -> G e. TarskiG )
21	15	adantr 481	. . 3 |- ( ( ph /\ A =/= B ) -> A e. P )
22		perpdrag.2	. . . . 5 |- ( ph -> B e. D )
23	5, 8, 7, 10, 13, 22	tglnpt 25444	. . . 4 |- ( ph -> B e. P )
24	23	adantr 481	. . 3 |- ( ( ph /\ A =/= B ) -> B e. P )
25	22	adantr 481	. . . 4 |- ( ( ph /\ A =/= B ) -> B e. D )
26		simpr 477	. . . . 5 |- ( ( ph /\ A =/= B ) -> A =/= B )
27	13	adantr 481	. . . . 5 |- ( ( ph /\ A =/= B ) -> D e. ran L )
28	14	adantr 481	. . . . 5 |- ( ( ph /\ A =/= B ) -> A e. D )
29	5, 7, 8, 20, 21, 24, 26, 26, 27, 28, 25	tglinethru 25531	. . . 4 |- ( ( ph /\ A =/= B ) -> D = ( A L B ) )
30	25, 29	eleqtrd 2703	. . 3 |- ( ( ph /\ A =/= B ) -> B e. ( A L B ) )
31	11	adantr 481	. . 3 |- ( ( ph /\ A =/= B ) -> C e. P )
32	12	adantr 481	. . . 4 |- ( ( ph /\ A =/= B ) -> D (⟂G ` G ) ( B L C ) )
33	29, 32	eqbrtrrd 4677	. . 3 |- ( ( ph /\ A =/= B ) -> ( A L B ) (⟂G ` G ) ( B L C ) )
34	5, 6, 7, 8, 20, 21, 24, 30, 31, 33	perprag 25618	. 2 |- ( ( ph /\ A =/= B ) -> <" A B C "> e. (∟G ` G ) )
35	19, 34	pm2.61dane 2881	1 |- ( ph -> <" A B C "> e. (∟G ` G ) )

Syntax hints:   -> wi 4   /\ wa 384   = wceq 1483   e. wcel 1990   =/= wne 2794   class class class wbr 4653   ran crn 5115   ` cfv 5888  (class class class)co 6650   <"cs3 13587   Basecbs 15857   distcds 15950  TarskiGcstrkg 25329  Itvcitv 25335  LineGclng 25336  pInvGcmir 25547  ∟Gcrag 25588  ⟂Gcperpg 25590

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1722  ax-4 1737  ax-5 1839  ax-6 1888  ax-7 1935  ax-8 1992  ax-9 1999  ax-10 2019  ax-11 2034  ax-12 2047  ax-13 2246  ax-ext 2602  ax-rep 4771  ax-sep 4781  ax-nul 4789  ax-pow 4843  ax-pr 4906  ax-un 6949  ax-cnex 9992  ax-resscn 9993  ax-1cn 9994  ax-icn 9995  ax-addcl 9996  ax-addrcl 9997  ax-mulcl 9998  ax-mulrcl 9999  ax-mulcom 10000  ax-addass 10001  ax-mulass 10002  ax-distr 10003  ax-i2m1 10004  ax-1ne0 10005  ax-1rid 10006  ax-rnegex 10007  ax-rrecex 10008  ax-cnre 10009  ax-pre-lttri 10010  ax-pre-lttrn 10011  ax-pre-ltadd 10012  ax-pre-mulgt0 10013

This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3or 1038  df-3an 1039  df-tru 1486  df-ex 1705  df-nf 1710  df-sb 1881  df-eu 2474  df-mo 2475  df-clab 2609  df-cleq 2615  df-clel 2618  df-nfc 2753  df-ne 2795  df-nel 2898  df-ral 2917  df-rex 2918  df-reu 2919  df-rmo 2920  df-rab 2921  df-v 3202  df-sbc 3436  df-csb 3534  df-dif 3577  df-un 3579  df-in 3581  df-ss 3588  df-pss 3590  df-nul 3916  df-if 4087  df-pw 4160  df-sn 4178  df-pr 4180  df-tp 4182  df-op 4184  df-uni 4437  df-int 4476  df-iun 4522  df-br 4654  df-opab 4713  df-mpt 4730  df-tr 4753  df-id 5024  df-eprel 5029  df-po 5035  df-so 5036  df-fr 5073  df-we 5075  df-xp 5120  df-rel 5121  df-cnv 5122  df-co 5123  df-dm 5124  df-rn 5125  df-res 5126  df-ima 5127  df-pred 5680  df-ord 5726  df-on 5727  df-lim 5728  df-suc 5729  df-iota 5851  df-fun 5890  df-fn 5891  df-f 5892  df-f1 5893  df-fo 5894  df-f1o 5895  df-fv 5896  df-riota 6611  df-ov 6653  df-oprab 6654  df-mpt2 6655  df-om 7066  df-1st 7168  df-2nd 7169  df-wrecs 7407  df-recs 7468  df-rdg 7506  df-1o 7560  df-oadd 7564  df-er 7742  df-map 7859  df-pm 7860  df-en 7956  df-dom 7957  df-sdom 7958  df-fin 7959  df-card 8765  df-cda 8990  df-pnf 10076  df-mnf 10077  df-xr 10078  df-ltxr 10079  df-le 10080  df-sub 10268  df-neg 10269  df-nn 11021  df-2 11079  df-3 11080  df-n0 11293  df-xnn0 11364  df-z 11378  df-uz 11688  df-fz 12327  df-fzo 12466  df-hash 13118  df-word 13299  df-concat 13301  df-s1 13302  df-s2 13593  df-s3 13594  df-trkgc 25347  df-trkgb 25348  df-trkgcb 25349  df-trkg 25352  df-cgrg 25406  df-mir 25548  df-rag 25589  df-perpg 25591

This theorem is referenced by: (None)