{"book":"adl0946","page":269,"text":"۲۶۲\nقوس ها را مانند خط صحیح اندازه می گیرند یعنی مثلاً می گویند که\nاندازهٔ فلان قوس ۷ است در صورتیکه شامل ۷ واحد قوس\nباشد-\nو همچنین اگر ثلث واحد قوس ۱۱ مرتبه در قوس اندازه\nگرفتنی نگنجد اندازهٔ آن قوس چنین می شود ۱۱/۳ وغیره -\nپس اندازه گرفتن هر قوس عبارت است از یافتن عددی\nکه تعیین می کند چند مرتبه واحد قوس یا اجزاء آن در ان\nقوس می گنجد -\n۲۶۶ - واحد قوس - سابقاً دیدیم (عـ۸۹) که زوایای\nمرکزی مساوی از دائره قوس های مساوی جدا می کنند و\nبالعكس قوس های مساوی هر دائره مقابل با زوایای مرکزی\nمساوی است و نیز سابقاً چنین تعریف کردیم قوس یک درجه\nقوسی است که مقابل بزادیه مرکزی یک درجه باشد و این قوس\nمعین نیست مگر آنکه شعاع دائره معلوم باشد (عـ۹۳) -\nمن بعد در تمام مطالبی که ذکر می کنیم فرض می کنیم که قوسها","chars":700,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00269.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/adl0946/269","canvas":"https://afghanpress.org/iiif/adl0946/canvas/269","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."}}