{"book":"adl0946","page":270,"text":"۲۶۳\nمتعلق بیک دائره اند بنابرین می توانیم بگوئیم قوس یک درجه یا یک دقیقه یا یک ثانیه مقصود بآن آنست که قسمی مزبوره بواسطهٔ زاویهٔ مرکزی یک درجه و یک دقیقه و یک ثانیه از دائره جدا شده اند .\nازین قراری که گذاشتیم یک زاویه مرکزی که ً۳ َ۱۲ ْ۷۵ باشد قوسی از دائره جدا می کند مساوی با ً۳ َ۱۲ ْ۷۵ پس می توانیم چنین بیان کنیم -\nچون واحد قوس را قوسی انتخاب کردیم که بواسطه زاویه مرکزی یک درجه جدا شده باشد پس تمام زوایای مرکزی را باهمان اعدادی اندازه می گیریم که قوس های مقابل بانها و اندازه گرفته ایم .\nباین طریق بجای اندازه گرفتن قوس می توان زاویه مرکزی مقابل آنرا اندازه گرفت -\n۲۹۷ - آنچه را گفتیم راجع بزوایائی بود که رأس شان روی","chars":624,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00270.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/adl0946/270","canvas":"https://afghanpress.org/iiif/adl0946/canvas/270","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."}}