{"book":"adl0946","page":209,"text":"۲۰۲\n\nفرض می کنیم دو زاویه آ و ج در دست باشد (س ۱۷۶)\nکافی است که قطعه م\nخطی مانند اج رسم\nکرده از نقطه ا زاویه\nمانند م ا ج مساوی ج\nیا آا از نقطه ج\nزاویه مانند ل ج ا\nمساوی باج در یک طرف ا ج رسم نمائیم.\nدو خط ج ل و ام در نقطه د یک دیگر را قطع میکنند\n(مطلب اقلیدس) و مثلث ا ج د جواب مطلوب است\nعده جواب های این مسئله لا یتناهی است زیرا که قطعه\nخط ا ج را بمیل خود بهر طول که خواسته باشیم ممکن است\nانتخاب کنیم ولی زوایای تمام مثلثات مرتباً با هم مساویند.\n۲۳۹ - تعریف - مثلثی را که يك زاویه اش\nقائمه باشد - مثلث قائمه الزاویه مینامند","chars":524,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00209.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/adl0946/209","canvas":"https://afghanpress.org/iiif/adl0946/canvas/209","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."}}