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Theorem oacgr 25523
Description: Vertical angle theorem. Vertical, or opposite angles are the facing pair of angles formed when two lines intersect. Eudemus of Rhodes attributed the proof to Thales of Miletus. The proposition showed that since both of a pair of vertical angles are supplementary to both of the adjacent angles, the vertical angles are equal in measure. We follow the same path. Theorem 11.14 of [Schwabhauser] p. 98. (Contributed by Thierry Arnoux, 27-Sep-2020.)
Hypotheses
Ref Expression
dfcgra2.p 𝑃 = (Base‘𝐺)
dfcgra2.i 𝐼 = (Itv‘𝐺)
dfcgra2.m = (dist‘𝐺)
dfcgra2.g (𝜑𝐺 ∈ TarskiG)
dfcgra2.a (𝜑𝐴𝑃)
dfcgra2.b (𝜑𝐵𝑃)
dfcgra2.c (𝜑𝐶𝑃)
dfcgra2.d (𝜑𝐷𝑃)
dfcgra2.e (𝜑𝐸𝑃)
dfcgra2.f (𝜑𝐹𝑃)
oacgr.1 (𝜑𝐵 ∈ (𝐴𝐼𝐷))
oacgr.2 (𝜑𝐵 ∈ (𝐶𝐼𝐹))
oacgr.3 (𝜑𝐵𝐴)
oacgr.4 (𝜑𝐵𝐶)
oacgr.5 (𝜑𝐵𝐷)
oacgr.6 (𝜑𝐵𝐹)
Assertion
Ref Expression
oacgr (𝜑 → ⟨“𝐴𝐵𝐶”⟩(cgrA‘𝐺)⟨“𝐷𝐵𝐹”⟩)

Proof of Theorem oacgr
StepHypRef Expression
1 dfcgra2.p . 2 𝑃 = (Base‘𝐺)
2 dfcgra2.i . 2 𝐼 = (Itv‘𝐺)
3 dfcgra2.g . 2 (𝜑𝐺 ∈ TarskiG)
4 eqid 2610 . 2 (hlG‘𝐺) = (hlG‘𝐺)
5 dfcgra2.a . 2 (𝜑𝐴𝑃)
6 dfcgra2.b . 2 (𝜑𝐵𝑃)
7 dfcgra2.c . 2 (𝜑𝐶𝑃)
8 oacgr.3 . . . 4 (𝜑𝐵𝐴)
98necomd 2837 . . 3 (𝜑𝐴𝐵)
10 oacgr.4 . . 3 (𝜑𝐵𝐶)
111, 2, 3, 4, 5, 6, 7, 9, 10cgraswap 25512 . 2 (𝜑 → ⟨“𝐴𝐵𝐶”⟩(cgrA‘𝐺)⟨“𝐶𝐵𝐴”⟩)
12 dfcgra2.d . 2 (𝜑𝐷𝑃)
13 dfcgra2.f . 2 (𝜑𝐹𝑃)
14 dfcgra2.m . . 3 = (dist‘𝐺)
15 oacgr.6 . . . . 5 (𝜑𝐵𝐹)
1615necomd 2837 . . . 4 (𝜑𝐹𝐵)
171, 2, 3, 4, 13, 6, 5, 16, 8cgraswap 25512 . . 3 (𝜑 → ⟨“𝐹𝐵𝐴”⟩(cgrA‘𝐺)⟨“𝐴𝐵𝐹”⟩)
18 oacgr.2 . . . 4 (𝜑𝐵 ∈ (𝐶𝐼𝐹))
191, 14, 2, 3, 7, 6, 13, 18tgbtwncom 25183 . . 3 (𝜑𝐵 ∈ (𝐹𝐼𝐶))
20 oacgr.1 . . 3 (𝜑𝐵 ∈ (𝐴𝐼𝐷))
21 oacgr.5 . . 3 (𝜑𝐵𝐷)
221, 2, 14, 3, 13, 6, 5, 5, 6, 13, 7, 12, 17, 19, 20, 10, 21sacgr 25522 . 2 (𝜑 → ⟨“𝐶𝐵𝐴”⟩(cgrA‘𝐺)⟨“𝐷𝐵𝐹”⟩)
231, 2, 3, 4, 5, 6, 7, 7, 6, 5, 11, 12, 6, 13, 22cgratr 25515 1 (𝜑 → ⟨“𝐴𝐵𝐶”⟩(cgrA‘𝐺)⟨“𝐷𝐵𝐹”⟩)
Colors of variables: wff setvar class
Syntax hints:  wi 4   = wceq 1475  wcel 1977  wne 2780   class class class wbr 4583  cfv 5804  (class class class)co 6549  ⟨“cs3 13438  Basecbs 15695  distcds 15777  TarskiGcstrkg 25129  Itvcitv 25135  hlGchlg 25295  cgrAccgra 25499
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1713  ax-4 1728  ax-5 1827  ax-6 1875  ax-7 1922  ax-8 1979  ax-9 1986  ax-10 2006  ax-11 2021  ax-12 2034  ax-13 2234  ax-ext 2590  ax-rep 4699  ax-sep 4709  ax-nul 4717  ax-pow 4769  ax-pr 4833  ax-un 6847  ax-cnex 9871  ax-resscn 9872  ax-1cn 9873  ax-icn 9874  ax-addcl 9875  ax-addrcl 9876  ax-mulcl 9877  ax-mulrcl 9878  ax-mulcom 9879  ax-addass 9880  ax-mulass 9881  ax-distr 9882  ax-i2m1 9883  ax-1ne0 9884  ax-1rid 9885  ax-rnegex 9886  ax-rrecex 9887  ax-cnre 9888  ax-pre-lttri 9889  ax-pre-lttrn 9890  ax-pre-ltadd 9891  ax-pre-mulgt0 9892
This theorem depends on definitions:  df-bi 196  df-or 384  df-an 385  df-3or 1032  df-3an 1033  df-tru 1478  df-ex 1696  df-nf 1701  df-sb 1868  df-eu 2462  df-mo 2463  df-clab 2597  df-cleq 2603  df-clel 2606  df-nfc 2740  df-ne 2782  df-nel 2783  df-ral 2901  df-rex 2902  df-reu 2903  df-rmo 2904  df-rab 2905  df-v 3175  df-sbc 3403  df-csb 3500  df-dif 3543  df-un 3545  df-in 3547  df-ss 3554  df-pss 3556  df-nul 3875  df-if 4037  df-pw 4110  df-sn 4126  df-pr 4128  df-tp 4130  df-op 4132  df-uni 4373  df-int 4411  df-iun 4457  df-br 4584  df-opab 4644  df-mpt 4645  df-tr 4681  df-eprel 4949  df-id 4953  df-po 4959  df-so 4960  df-fr 4997  df-we 4999  df-xp 5044  df-rel 5045  df-cnv 5046  df-co 5047  df-dm 5048  df-rn 5049  df-res 5050  df-ima 5051  df-pred 5597  df-ord 5643  df-on 5644  df-lim 5645  df-suc 5646  df-iota 5768  df-fun 5806  df-fn 5807  df-f 5808  df-f1 5809  df-fo 5810  df-f1o 5811  df-fv 5812  df-riota 6511  df-ov 6552  df-oprab 6553  df-mpt2 6554  df-om 6958  df-1st 7059  df-2nd 7060  df-wrecs 7294  df-recs 7355  df-rdg 7393  df-1o 7447  df-oadd 7451  df-er 7629  df-map 7746  df-pm 7747  df-en 7842  df-dom 7843  df-sdom 7844  df-fin 7845  df-card 8648  df-cda 8873  df-pnf 9955  df-mnf 9956  df-xr 9957  df-ltxr 9958  df-le 9959  df-sub 10147  df-neg 10148  df-nn 10898  df-2 10956  df-3 10957  df-n0 11170  df-xnn0 11241  df-z 11255  df-uz 11564  df-fz 12198  df-fzo 12335  df-hash 12980  df-word 13154  df-concat 13156  df-s1 13157  df-s2 13444  df-s3 13445  df-trkgc 25147  df-trkgb 25148  df-trkgcb 25149  df-trkg 25152  df-cgrg 25206  df-leg 25278  df-hlg 25296  df-mir 25348  df-cgra 25500
This theorem is referenced by: (None)
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