Students and teachers pose in a classroom with blackboards filled with math

Front:
XXI Jur aimitar podoyponasmay edi Leide (15) Limultaneous Equation Theorem Lomullanoe Guation Enany truangle thehsytor of am angh durdes the ofporile side into lar sach to sach, and aroalahiog hivem E amd Logous verticie into the same mumber Guen line aBbizcting gone ac and ac; and linees Ee Et Jo prove A al aimilar to4 0 A and A Cde = A Cael 4TS dacnthidls.rial toth L:15 at 9 Te forove E ē ac Bawrline ReWaBimuetingCa -12 X-244=DS 98 an -13 4X49 3X-1 aln (2eBmetingCa Proof Aimey goneac and at produad atê <ABE=BOBand Guk-4Ca8. (12 str s are eut an Lofoneo an Lofthe ocher, X+= au =b Ihe it andf= 6 Cna lyabransoersale altint. ez k manmer ABecie lar Lar, La=Ld, and Ak are simar. (Jwo triamolesare similar when includingthesboortional) 3E8 arhd H cmnesponding ari=.). Acde ie eimilar to A Cde. Herce act

Back:
A z 0 A ( No = ( NOC A A z 0 A Ο.