{"book":"adl0946","page":61,"text":"۵۴\n۷۱- دائره - پرکاری برداشته بیک شاخه آن مدادی\nنصب میکنیم بعد نوک سوزن\nآن را در نقطه ماننده (س ۲۲)\nو سر مداد را روی کاغذ\nقراری دهیم آنگاه آنرا\nبدور خود می چرخا نیم آنوقت\nخطی بدست ما می آید که نه \nمستقیم است و نه از قطعات مستقمه تشکیل یافته و آن را\nخط منحنی مینامیم و این خط منحنی مخصوص را یک دائره میگوئیم در\nوقت ترسیم آن همواره فاصلۀ بین نوک سوزن و نوک مداد ثابت\nبوده تغییر نکرده است پس تمام نقاط آن از نقطه ه بیک فاصله\nاست و نقطه ه را مرکز دائره می گوئیم پس می توانیم تعریف ذیل\nرا قرار دهیم :\nدائره خط منحنی مسدودی است که تمام نقاط آن\nبیک فاصله است از نقطه ثابتی موسوم بمرکز.","chars":578,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00061.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/adl0946/61","canvas":"https://afghanpress.org/iiif/adl0946/canvas/61","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."}}