{"book":"adl0131","page":103,"text":"کتاب ۹۲ مساحت\n\n۲۰ فت است پس قطر را دریافت کنید -\n(۱۶) قطر یک دائره از دو چند وتر قوس آن یک فث کم است و وترقو\nاز ارتفاع آن یک فث زیاده است پس وتر قوس را معلوم کنید.\n(۱۷) قطر دائره ۳۵ فت و ارتفاع قوس ۷ فت است پس وتر قوس را\nدریافت کنید -\n(۱۸) قطر یک دائره ۳۰ انچ است و از یک و ترکه برین عمود است ق\nپانچنیین دو حصه است منقسم میشوند که یک حصه از دیگر چهار چند است.\nپس وتر مذکور را دریافت کنید -\n(۱۹) قطر یک دائره ۵۰ فث به وتر ۴۰ فث است پس ارتفاع قوام\nمعلوم کنید -\n(۲۰) قطر یک دائره از وتر ۸ فت کلان است اگر در بینها نسبت پر\n۴ و ۵ باشد پس ارتفاع قوس چقدر خواهد بود -\nفصل هشتم محیط دائره\n(۱۰۰) نسبت","chars":591,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00103.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/103","canvas":"https://afghanpress.org/iiif/adl0131/canvas/103","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."}}