{"book":"adl0946","page":260,"text":"۲۵۳\nهرگاه ذواربعة اضلاعی دو محور تناظر عمود برهم\nقبول کند بقسمیکه هيچيك از رؤس روی این\nمحورها نباشد آن شکل مستطیل است .\n۲۸۹ - تساوی اقطار - از قضیهٔ ۲۸۷ چنین\nنتیجه می شود که دو قطر مربع مستطیل باهم مساویند زیراکه نسبت\nبه هریک از دو محور متناظره اند .\nحال دو خط غیر معین رسم می کنیم که یک دیگر را در نقطهٔ ه قطع کنند (سر ۳۰۱)\nبعد چهار فاصله مساوی ه ج و ه ن و ه د و ه ا را جدا می کنیم - شکل ا ج د ن متوازی الاضلاع است (۲۸۴) .\nدو مثلث ا د ن و ج د ن را ملاحظه می کنیم در این دو مثلث ضلع ن د مشترک است و دو ضلع ج ن و ا د بنابر فرض نیز مساویند و دو ضلع ا ن و ج ن نیز چون اضلاع","chars":570,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00260.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/adl0946/260","canvas":"https://afghanpress.org/iiif/adl0946/canvas/260","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."}}