{"book":"adl0946","page":228,"text":"۲۲۱\nدو خط ح م و د ل یک دیگر را در نقطه ا قطع میکنند (ش۱۸۸)\nو مثلث ا د ج مثلث مطلوب است می توانیم دو زاویه\nرا در طرف دیگر خط ج د رسم کنیم آن وقت مثلث اَ د ج بدست\nمی آید که شکل تناظرۀ مثلث ا ج د است.\nپس می بینیم که این مسئله فقط دارائی یک جواب است.\n۲۵۸ - حالت اول تساوی دو مثلث - از روی\nمسئله فوق معلوم می شود هرگاه مثلث دیگری مانند ع ص ف\nداشته باشیم که در آن ضلع ۶ ص مساوی با ضلع دج و ع^\n= د^ و ص^ = ج^ باشد و آن مثلث را برداشته\nروی یکی از این دو مثلث مساوی قرار دهیم بر آن منطبق\nگردیده با آن مساوی می شود.\nپس می گوئیم -\nقضیه - هر گاه دو زاویه و ضلع بینهما از مثلثی\nمساوی باشد با دو زاویه و ضلع بینهما از مثلث دیگر\nآن دو مثلث مساویند.","chars":633,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00228.jpg","first_page":1,"last_page":327,"title":"Handasah-ʼi musaṭṭaḥah barā-yi ṣinf-i haftum-i makātib-i rushdīyah, bi-qarār-i prūghram-i Vizārat-i Jalīlah-ʼi Muʻārif-i Afghānistān هندسۀ مسطحه :هندسۀ مسطحه","permalink":"https://afghanpress.org/book/adl0946/228","canvas":"https://afghanpress.org/iiif/adl0946/canvas/228","source":"https://afghanistandl.nyu.edu/books/adl0946/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0946_download.pdf","rights":{"image":{"statement":"Public domain. NYU states: \"All works presented on this website are, unless otherwise indicated, in the public domain. The images available on this website may be freely reproduced, distributed and transmitted by anyone for any purpose, commercial or non-commercial.\"","uri":"http://rightsstatements.org/vocab/NoC-US/1.0/","holder":"New York University Libraries","source":"https://afghanistandl.nyu.edu/about.html","delivery":"Images are served from a copy mirrored by this project, not from NYU's servers, under the reproduction terms above.","endorsement":"This is an independent project. It is not affiliated with, endorsed by, or reviewed by New York University."},"text":{"statement":"Machine-generated transcription, dedicated to the public domain under CC0 1.0. No warranty of accuracy: see the provenance block on every page.","uri":"https://creativecommons.org/publicdomain/zero/1.0/","holder":"Steps Ventures"}},"provenance":{"text_produced_by":"gemini-3.1-pro-preview","thinking_level":"low","read_completed":"2026-08-09","per_page_confidence":null,"per_page_confidence_note":"Not recorded during the corpus run. No calibrated per-page score exists, and none is estimated here.","human_reviewed":false,"accuracy_context":"Roughly two thirds of characters agree with a modern printed edition of the same text. Much of the disagreement is editorial, not misreading. Treat the transcription as a finding aid and read the page image before quoting.","primary_source":"The page image. The text is an index into it."}}