{"book":"adl0946","page":272,"text":"۲۶۵\n\nزاویه را زاویۀ مُحاطی می‌گویند مثلاً در س۲۰۹ زاویۀ ا حَ د\nیک زاویه محاطی است ـ\nممکن است راس زاویه درون دائره باشند آن وقت اضلاع\nآن دو قطعه از اوتار دائره هستند چنین زاویه زاویۀ داخلی\nمی‌گویند ـ\nمثلاً در س۲۱۰ زاویه ا حَ د یک زاویه داخلی است بالآخره\nممکن است که راس زاویه در خارج دائره باشد آن وقت اضلاع\nآن اوتاری هستند که امتداد داده شده اند چنین زاویه را\nزاویه خارجی میخوانند ـ\nمثلاً در س۲۱۱ زاویه ا حَ د یک زاویۀ خارجی است ـ\n۲۹۹ ـ زوایای محاطی ـ اگر ا ح د زاویه باشد محاطی\n(س۲۱۲) از زاویه قوسی جدا می کند که مقابل بایک زاویه مرکزی\nا د ه است ـ\nبدواً ملاحظه می کنیم که قوس ا د ممکن است از نیم دائره\nبزرگتر باشد آن وقت زاویه مرکزی ا ه د بزرگ تر از ۱۸۰\nقضیه مستط...","chars":667,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00272.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/adl0946/272","canvas":"https://afghanpress.org/iiif/adl0946/canvas/272","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."}}