{"book":"adl0131","page":86,"text":"کتاب\n۷۵\nمساحت\n\nاضلاع مذکور متوازی آنهاد و دیگر خطوط مستقیم منقسم کشیده‌اند\nکه عمودی فاصله هر چهار خطوط برابراند پس طول هر دو خطوط\nمذکور را دریافت کنید.\nفصل هفتم وتر دائره\n(۷۸) فرض کنید که الف ب وتر دائره و ج مرکز دائرهٔ مذکور است\nو ج د وتر بر الف ب عمود است که خارج شده از محیط بر نقطه ی\nیکجا میشود پس نقطه د\nنقطه تنصیف وتر الف ب است\nو نقطه ی نقطه تنصیف قوس الف ی ب است و الف ب\nوتر قوس والف ی یای ب وتر نصف قوس و الف د ی\nارتفاع قوس است.\n(۷۹) ی ج را زیاده کرده از محیط با نقطه ف یکجا کنید پس از روی\nدفعه (۳۳) ی الف ف زاویه قائمه است پس بموجب دفعه (۳۷)","chars":550,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00086.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/86","canvas":"https://afghanpress.org/iiif/adl0131/canvas/86","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."}}