{"book":"adl0946","page":283,"text":"۲۷۶\n\nرا که از آنجا خط مفروضی بزاويه مفروضه دیده شود.\nاين مسئله بواسطۀ مسئله ۳۰۳ بر ما واضح میگردد .\nفرض می کنیم که ه زاويه مفروضه و ح د قطعه خط مفروضه\nباشد مثلثی رسم می کنیم که در آن زاویه ا مقابل بضلع د ج\nمساوی با زاویه مفروضه ه باشد (سر۲۲۵) نقطه ا یکی از نقاط\nمکان مهندسی است حال دائرۀ\nس را بر مثلث ا د ج محیط\nمی کنیم می دانیم که هر نقطه از قوس\nج ا د مانند ل فرض کنیم زاوية\nل نیز مساوی با زاویه مفروضه\nه خواهد شد .\nولی اگر نقطه مانند ن روی قوس ج د ن بگیریم زاویه\nن مساوی با زاویه مفروضه ه نخواهد گردید زیرا که همان قوس\nرا از دائره جدا نمیکند حال طریق ساختن دائرۀ محیطی مثلث را\nبیان می کنیم و ملاحظه می نمائیم که اگر از نقطه د خط دك را","chars":636,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00283.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/adl0946/283","canvas":"https://afghanpress.org/iiif/adl0946/canvas/283","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."}}