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| Mirrors > Home > MPE Home > Th. List > Mathboxes > tgextancd | Structured version Visualization version GIF version | ||
| Description: The target-side non-collinearity of the exterior angle. Line 𝐶𝐷 is line 𝐶𝐵-- 𝐶 lies between 𝐵 and 𝐷, and 𝐶 ≠ 𝐷-- so 𝐴 is off it exactly because the triangle is non-degenerate. This is acopyeu 29372's acopy.2 frame hypothesis in tgextancgra 33104, and it is what excludes isinag 29387's 𝑥 = 𝐶 branch in tgextahp 33103. (Contributed by JAG, 12-Aug-2026.) |
| Ref | Expression |
|---|---|
| tgextancd.p | ⊢ 𝑃 = (Base‘𝐺) |
| tgextancd.m | ⊢ − = (dist‘𝐺) |
| tgextancd.i | ⊢ 𝐼 = (Itv‘𝐺) |
| tgextancd.l | ⊢ 𝐿 = (LineG‘𝐺) |
| tgextancd.g | ⊢ (𝜑 → 𝐺 ∈ TarskiG) |
| tgextancd.a | ⊢ (𝜑 → 𝐴 ∈ 𝑃) |
| tgextancd.b | ⊢ (𝜑 → 𝐵 ∈ 𝑃) |
| tgextancd.c | ⊢ (𝜑 → 𝐶 ∈ 𝑃) |
| tgextancd.d | ⊢ (𝜑 → 𝐷 ∈ 𝑃) |
| tgextancd.ext | ⊢ (𝜑 → 𝐶 ∈ (𝐵𝐼𝐷)) |
| tgextancd.ncol | ⊢ (𝜑 → ¬ (𝐴 ∈ (𝐵𝐿𝐶) ∨ 𝐵 = 𝐶)) |
| tgextancd.ne | ⊢ (𝜑 → 𝐶 ≠ 𝐷) |
| Ref | Expression |
|---|---|
| tgextancd | ⊢ (𝜑 → ¬ (𝐴 ∈ (𝐶𝐿𝐷) ∨ 𝐶 = 𝐷)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | tgextancd.p | . . . . . . 7 ⊢ 𝑃 = (Base‘𝐺) | |
| 2 | tgextancd.l | . . . . . . 7 ⊢ 𝐿 = (LineG‘𝐺) | |
| 3 | tgextancd.i | . . . . . . 7 ⊢ 𝐼 = (Itv‘𝐺) | |
| 4 | tgextancd.g | . . . . . . 7 ⊢ (𝜑 → 𝐺 ∈ TarskiG) | |
| 5 | tgextancd.b | . . . . . . 7 ⊢ (𝜑 → 𝐵 ∈ 𝑃) | |
| 6 | tgextancd.c | . . . . . . 7 ⊢ (𝜑 → 𝐶 ∈ 𝑃) | |
| 7 | tgextancd.a | . . . . . . 7 ⊢ (𝜑 → 𝐴 ∈ 𝑃) | |
| 8 | tgextancd.ncol | . . . . . . 7 ⊢ (𝜑 → ¬ (𝐴 ∈ (𝐵𝐿𝐶) ∨ 𝐵 = 𝐶)) | |
| 9 | 1, 2, 3, 4, 5, 6, 7, 8 | ncolcom 29054 | . . . . . 6 ⊢ (𝜑 → ¬ (𝐴 ∈ (𝐶𝐿𝐵) ∨ 𝐶 = 𝐵)) |
| 10 | ioran 999 | . . . . . 6 ⊢ (¬ (𝐴 ∈ (𝐶𝐿𝐵) ∨ 𝐶 = 𝐵) ↔ (¬ 𝐴 ∈ (𝐶𝐿𝐵) ∧ ¬ 𝐶 = 𝐵)) | |
| 11 | 9, 10 | sylib 221 | . . . . 5 ⊢ (𝜑 → (¬ 𝐴 ∈ (𝐶𝐿𝐵) ∧ ¬ 𝐶 = 𝐵)) |
| 12 | 11 | simpld 500 | . . . 4 ⊢ (𝜑 → ¬ 𝐴 ∈ (𝐶𝐿𝐵)) |
| 13 | 11 | simprd 501 | . . . . . . 7 ⊢ (𝜑 → ¬ 𝐶 = 𝐵) |
| 14 | 13 | neqned 2966 | . . . . . 6 ⊢ (𝜑 → 𝐶 ≠ 𝐵) |
| 15 | tgextancd.d | . . . . . 6 ⊢ (𝜑 → 𝐷 ∈ 𝑃) | |
| 16 | tgextancd.ne | . . . . . . 7 ⊢ (𝜑 → 𝐶 ≠ 𝐷) | |
| 17 | 16 | necomd 3014 | . . . . . 6 ⊢ (𝜑 → 𝐷 ≠ 𝐶) |
| 18 | tgextancd.m | . . . . . . . . 9 ⊢ − = (dist‘𝐺) | |
| 19 | tgextancd.ext | . . . . . . . . 9 ⊢ (𝜑 → 𝐶 ∈ (𝐵𝐼𝐷)) | |
| 20 | 1, 18, 3, 4, 5, 6, 15, 19 | tgbtwncom 28981 | . . . . . . . 8 ⊢ (𝜑 → 𝐶 ∈ (𝐷𝐼𝐵)) |
| 21 | 1, 2, 3, 4, 6, 5, 15, 20 | btwncolg2 29049 | . . . . . . 7 ⊢ (𝜑 → (𝐷 ∈ (𝐶𝐿𝐵) ∨ 𝐶 = 𝐵)) |
| 22 | 21, 13 | olcnd 891 | . . . . . 6 ⊢ (𝜑 → 𝐷 ∈ (𝐶𝐿𝐵)) |
| 23 | 1, 3, 2, 4, 6, 5, 14, 15, 17, 22 | tglineelsb2 29130 | . . . . 5 ⊢ (𝜑 → (𝐶𝐿𝐵) = (𝐶𝐿𝐷)) |
| 24 | 23 | eleq2d 2850 | . . . 4 ⊢ (𝜑 → (𝐴 ∈ (𝐶𝐿𝐵) ↔ 𝐴 ∈ (𝐶𝐿𝐷))) |
| 25 | 12, 24 | mtbid 327 | . . 3 ⊢ (𝜑 → ¬ 𝐴 ∈ (𝐶𝐿𝐷)) |
| 26 | 16 | neneqd 2964 | . . 3 ⊢ (𝜑 → ¬ 𝐶 = 𝐷) |
| 27 | 25, 26 | jca 521 | . 2 ⊢ (𝜑 → (¬ 𝐴 ∈ (𝐶𝐿𝐷) ∧ ¬ 𝐶 = 𝐷)) |
| 28 | ioran 999 | . 2 ⊢ (¬ (𝐴 ∈ (𝐶𝐿𝐷) ∨ 𝐶 = 𝐷) ↔ (¬ 𝐴 ∈ (𝐶𝐿𝐷) ∧ ¬ 𝐶 = 𝐷)) | |
| 29 | 27, 28 | sylibr 237 | 1 ⊢ (𝜑 → ¬ (𝐴 ∈ (𝐶𝐿𝐷) ∨ 𝐶 = 𝐷)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ∧ wa 401 ∨ wo 861 = wceq 1570 ∈ wcel 2147 ≠ wne 2959 ‘cfv 6558 (class class class)co 7443 Basecbs 17416 distcds 17466 TarskiGcstrkg 28919 Itvcitv 28925 LineGclng 28926 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-10 2180 ax-11 2197 ax-12 2216 ax-ext 2735 ax-rep 5235 ax-sep 5252 ax-nul 5263 ax-pow 5331 ax-pr 5395 ax-un 7775 ax-cnex 11283 ax-resscn 11284 ax-1cn 11285 ax-icn 11286 ax-addcl 11287 ax-addrcl 11288 ax-mulcl 11289 ax-mulrcl 11290 ax-mulcom 11291 ax-addass 11292 ax-mulass 11293 ax-distr 11294 ax-i2m1 11295 ax-1ne0 11296 ax-1rid 11297 ax-rnegex 11298 ax-rrecex 11299 ax-cnre 11300 ax-pre-lttri 11301 ax-pre-lttrn 11302 ax-pre-ltadd 11303 ax-pre-mulgt0 11304 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2102 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2839 df-nfc 2913 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-reu 3370 df-rab 3417 df-v 3456 df-sbc 3743 df-csb 3852 df-ss 3901 df-pss 4017 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-tp 4593 df-op 4839 df-uni 4871 df-int 4911 df-iun 4956 df-br 5107 df-opab 5171 df-mpt 5190 df-tr 5216 df-id 5550 df-eprel 5555 df-po 5563 df-so 5564 df-fr 5608 df-we 5610 df-xp 5661 df-rel 5662 df-cnv 5663 df-co 5664 df-dm 5665 df-rn 5666 df-res 5667 df-ima 5668 df-pred 6322 df-ord 6383 df-on 6384 df-lim 6385 df-suc 6386 df-iota 6512 df-fun 6560 df-fn 6561 df-f 6562 df-f1 6563 df-fo 6564 df-f1o 6565 df-fv 6566 df-riota 7400 df-ov 7446 df-oprab 7447 df-mpo 7448 df-om 7902 df-1st 8025 df-2nd 8026 df-frecs 8327 df-wrecs 8358 df-recs 8407 df-rdg 8446 df-1o 8504 df-oadd 8508 df-er 8745 df-pm 8878 df-en 9002 df-dom 9003 df-sdom 9004 df-fin 9005 df-dju 10009 df-card 10047 df-pnf 11372 df-mnf 11373 df-xr 11374 df-ltxr 11375 df-le 11376 df-sub 11570 df-neg 11571 df-nn 12363 df-2 12432 df-3 12433 df-n0 12634 df-xnn0 12707 df-z 12721 df-uz 12993 df-fz 13667 df-fzo 13816 df-hash 14502 df-word 14686 df-concat 14743 df-s1 14770 df-s2 15027 df-s3 15028 df-trkgc 28940 df-trkgb 28941 df-trkgcb 28942 df-trkg 28945 df-cgrg 29004 |
| This theorem is used by: tgextahp 33103 tgextancgra 33104 |
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