{"book":"adl0131","page":320,"text":"کتاب ٣٠٩ مساحت\n\nپس اگر خط الف ب از نقطه الف بطرف ب پیمایش کرده شود در\nکتاب پیمایش اطلاعی نوشته میشود که سمت ب ج بطرف\nدست چپ الف ب است پس مثلث الف ب ج با صحت کشیده\nخواهد شد – فرض کنید که خط الف ب بالای کاغذ بذریعه پیمانۀ\nکامل پیمایش شده ساخته شده است و طول ب ج معلوم است\nنقطه ب را مرکز تصور نموده\nبر نصف قطر ب ج دایره\nبکشید که وقتیکه نیز ج الف پیمایش شود پس نقطه الف را\nمرکز تصور نموده بر نصف قطر الف ج یک دایرۀ دیگر بکشید که\nدائرۀ اول را بر نقطۀ ج قطع کند پس الف ب ج مثلث شد که\nدر کتاب پیمایش نوشته شده بود – و اگر سمت خط مذکوره بطرف\nدست راست میبود پس مثلث الف ب ج طیار میشد و وسعت\nاصول مذکوره بالانهایت گنجان کرده میشود – چرا که فرض کنید","chars":638,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00320.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/320","canvas":"https://afghanpress.org/iiif/adl0131/canvas/320","source":"https://afghanistandl.nyu.edu/books/adl0131/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0131_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."}}