{"book":"adl0946","page":41,"text":"۳۴\n\nهمان طور که در ع ۳۵ معمول داشتیم اگر ۱۸۰ زاویه را که هر یک\nمساوی یک درجه باشند بمجاورت یک دیگر قرار دهیم ۹۰ زاویه\nاوّل یک قائمه تشکیل میدهند و ۹۰ زاویهٔ ثانی هم یک قائمه\nمی باشند شکلی که حاصل میشود عیناً مثل آن میماند که دو زاویهٔ\nقائمه مجاوره رسم کرده هر یک را به ۹۰ درجه قسمت کرده باشیم س ع ۳۴\nآن دو زاویهٔ قائمه را بدون\nتقسیمات جز نشان میدهند\nبنا بر ع ۳۷ میدانیم که ه ج و\nه ا بر استقامت یک خط\nمیباشد.\nسر ع ۴۱\nشکلی که از ه ا و ه ج تشکیل می شود یک زاویهٔ تشکیل\nمیدهند زیرا که آن دو نیم خط از یک مبدء مشترک شروع شده\nاند فقط خاصیّت این زاویه آن ست که اضلاع آن در امتداد\nیک دیگر میباشند و دیدیم که آن زاویهٔ مجموع ۱۸۰ زاویه یک درجه\nاست پس میگوئیم:","chars":649,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00041.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/adl0946/41","canvas":"https://afghanpress.org/iiif/adl0946/canvas/41","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."}}