{"book":"adl0946","page":286,"text":"۲۷۹\n۳۱۵ - حالت مخصوص - زاویه ه قائمه است -\nاگر به س ۲۲۵ مراجعه کنیم می بینیم در حالتیکه زاویه مفروضه\nقائمه باشد قوس جـ د نیم دائره است و مکان هندسی مطلوب\nدائره است که بقطر جـ د باشد (س۲۲۷)\nدو قوسی که از این قطر حاصل می\nشود نسبت به اول متناظر اند و مکان\nهندسی مطلوب می باشند پس می گوئیم -\nقضیه - مکان هندسی\nنقاطی که از انها قطعه خط مفروضی\nبزاویه قائمه دیده شود دائره\nایست که قطرش قطعه خط مفروض باشد.\nچهار ضلعیهای محاطی\n۳۱۶ - ذو اربعة اضلاع یی را در صورتی میگویند\nمحاطی است که رئوسش روی محیط دائره باشند.","chars":502,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00286.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/adl0946/286","canvas":"https://afghanpress.org/iiif/adl0946/canvas/286","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."}}