{"book":"adl0946","page":210,"text":"۲۰۳\nو ضلع مقابل بزاویه قائمه را وتر\nمیگویند -\nس ۱۷۷ مثلث قائمه الزاویهٔ وج د را نشان میدهد\nزاویه و قائمه و ضلع د ج وتر\nآن است چونکه وتر نسبت بهر\nیک از دو ضلع دیگر مائل است\nپس از آن ها بزرگتر است\n(عک ۱۷)\n-ع م ۲- زاویه خارجی مثلث\nمثلث و ج د مفروض است\n(س۱۷۸) ضلع ج د را در آن طرف نقطه د امتداد\nمیدهیم -\nزاویهٔ ا د ل مکمل زاویهٔ و د ج از مثلث است -\nو چون مجموع دو زاویهٔ و و ج نیز مکمل همان زاویه است\nپس زاویهٔ خارجی ا د ل مساوی است با مجموع دو زاویهٔ","chars":447,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00210.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/adl0946/210","canvas":"https://afghanpress.org/iiif/adl0946/canvas/210","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."}}