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| Mirrors > Home > MPE Home > Th. List > isoas | Structured version Visualization version GIF version | ||
| Description: Congruence theorem for isocele triangles: if two angles of a triangle are congruent, then the corresponding sides also are. (Contributed by Thierry Arnoux, 5-Oct-2020.) |
| Ref | Expression |
|---|---|
| isoas.p | ⊢ 𝑃 = (Base‘𝐺) |
| isoas.m | ⊢ − = (dist‘𝐺) |
| isoas.i | ⊢ 𝐼 = (Itv‘𝐺) |
| isoas.l | ⊢ 𝐿 = (LineG‘𝐺) |
| isoas.g | ⊢ (𝜑 → 𝐺 ∈ TarskiG) |
| isoas.a | ⊢ (𝜑 → 𝐴 ∈ 𝑃) |
| isoas.b | ⊢ (𝜑 → 𝐵 ∈ 𝑃) |
| isoas.c | ⊢ (𝜑 → 𝐶 ∈ 𝑃) |
| isoas.1 | ⊢ (𝜑 → ¬ (𝐶 ∈ (𝐴𝐿𝐵) ∨ 𝐴 = 𝐵)) |
| isoas.2 | ⊢ (𝜑 → 〈“𝐴𝐵𝐶”〉(cgrA‘𝐺)〈“𝐴𝐶𝐵”〉) |
| Ref | Expression |
|---|---|
| isoas | ⊢ (𝜑 → (𝐴 − 𝐵) = (𝐴 − 𝐶)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | isoas.p | . 2 ⊢ 𝑃 = (Base‘𝐺) | |
| 2 | isoas.m | . 2 ⊢ − = (dist‘𝐺) | |
| 3 | isoas.i | . 2 ⊢ 𝐼 = (Itv‘𝐺) | |
| 4 | eqid 2763 | . 2 ⊢ (cgrG‘𝐺) = (cgrG‘𝐺) | |
| 5 | isoas.g | . 2 ⊢ (𝜑 → 𝐺 ∈ TarskiG) | |
| 6 | isoas.b | . 2 ⊢ (𝜑 → 𝐵 ∈ 𝑃) | |
| 7 | isoas.c | . 2 ⊢ (𝜑 → 𝐶 ∈ 𝑃) | |
| 8 | isoas.a | . 2 ⊢ (𝜑 → 𝐴 ∈ 𝑃) | |
| 9 | isoas.l | . . 3 ⊢ 𝐿 = (LineG‘𝐺) | |
| 10 | isoas.1 | . . . 4 ⊢ (𝜑 → ¬ (𝐶 ∈ (𝐴𝐿𝐵) ∨ 𝐴 = 𝐵)) | |
| 11 | 1, 9, 3, 5, 8, 6, 7, 10 | ncolrot1 28831 | . . 3 ⊢ (𝜑 → ¬ (𝐴 ∈ (𝐵𝐿𝐶) ∨ 𝐵 = 𝐶)) |
| 12 | 1, 2, 3, 5, 6, 7 | axtgcgrrflx 28731 | . . 3 ⊢ (𝜑 → (𝐵 − 𝐶) = (𝐶 − 𝐵)) |
| 13 | eqid 2763 | . . . . 5 ⊢ (hlG‘𝐺) = (hlG‘𝐺) | |
| 14 | isoas.2 | . . . . 5 ⊢ (𝜑 → 〈“𝐴𝐵𝐶”〉(cgrA‘𝐺)〈“𝐴𝐶𝐵”〉) | |
| 15 | 1, 3, 5, 13, 8, 6, 7, 8, 7, 6, 14 | cgracom 29133 | . . . 4 ⊢ (𝜑 → 〈“𝐴𝐶𝐵”〉(cgrA‘𝐺)〈“𝐴𝐵𝐶”〉) |
| 16 | 1, 3, 2, 5, 8, 7, 6, 8, 6, 7, 15 | cgraswaplr 29136 | . . 3 ⊢ (𝜑 → 〈“𝐵𝐶𝐴”〉(cgrA‘𝐺)〈“𝐶𝐵𝐴”〉) |
| 17 | 1, 2, 3, 5, 6, 7, 8, 7, 6, 8, 9, 11, 12, 16, 14 | tgasa 29176 | . 2 ⊢ (𝜑 → 〈“𝐵𝐶𝐴”〉(cgrG‘𝐺)〈“𝐶𝐵𝐴”〉) |
| 18 | 1, 2, 3, 4, 5, 6, 7, 8, 7, 6, 8, 17 | cgr3simp3 28791 | 1 ⊢ (𝜑 → (𝐴 − 𝐵) = (𝐴 − 𝐶)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ∨ wo 860 = wceq 1570 ∈ wcel 2143 class class class wbr 5109 ‘cfv 6536 (class class class)co 7410 〈“cs3 14875 Basecbs 17264 distcds 17314 TarskiGcstrkg 28696 Itvcitv 28702 LineGclng 28703 cgrGccgrg 28779 hlGchlg 28869 cgrAccgra 29118 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-rep 5238 ax-sep 5257 ax-nul 5269 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11151 ax-resscn 11152 ax-1cn 11153 ax-icn 11154 ax-addcl 11155 ax-addrcl 11156 ax-mulcl 11157 ax-mulrcl 11158 ax-mulcom 11159 ax-addass 11160 ax-mulass 11161 ax-distr 11162 ax-i2m1 11163 ax-1ne0 11164 ax-1rid 11165 ax-rnegex 11166 ax-rrecex 11167 ax-cnre 11168 ax-pre-lttri 11169 ax-pre-lttrn 11170 ax-pre-ltadd 11171 ax-pre-mulgt0 11172 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3745 df-csb 3854 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-pss 3925 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-tp 4594 df-op 4596 df-uni 4873 df-int 4913 df-iun 4958 df-br 5110 df-opab 5174 df-mpt 5193 df-tr 5219 df-id 5556 df-eprel 5561 df-po 5569 df-so 5570 df-fr 5614 df-we 5616 df-xp 5667 df-rel 5668 df-cnv 5669 df-co 5670 df-dm 5671 df-rn 5672 df-res 5673 df-ima 5674 df-pred 6302 df-ord 6363 df-on 6364 df-lim 6365 df-suc 6366 df-iota 6492 df-fun 6538 df-fn 6539 df-f 6540 df-f1 6541 df-fo 6542 df-f1o 6543 df-fv 6544 df-riota 7367 df-ov 7413 df-oprab 7414 df-mpo 7415 df-om 7859 df-1st 7982 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-1o 8449 df-oadd 8453 df-er 8690 df-map 8822 df-pm 8823 df-en 8940 df-dom 8941 df-sdom 8942 df-fin 8943 df-dju 9883 df-card 9921 df-pnf 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 df-sub 11438 df-neg 11439 df-nn 12229 df-2 12298 df-3 12299 df-n0 12500 df-xnn0 12573 df-z 12587 df-uz 12858 df-fz 13531 df-fzo 13679 df-hash 14363 df-word 14547 df-concat 14604 df-s1 14630 df-s2 14881 df-s3 14882 df-trkgc 28717 df-trkgb 28718 df-trkgcb 28719 df-trkgld 28721 df-trkg 28722 df-cgrg 28780 df-leg 28852 df-hlg 28870 df-mir 28930 df-rag 28974 df-perpg 28976 df-hpg 29040 df-mid 29083 df-lmi 29084 df-cgra 29119 |
| This theorem is referenced by: (None) |
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