{"book":"adl0946","page":208,"text":"۲۰۱\nبدست می آریم ازین قرار -\nاولاً - ممکن نیست که مثلثی دارای دو زاویه منفرجه\nیا قائمه باشد -\nزیرا که آن وقت مجموع سه زاویه از دو قائمه\nتجاوز خواهد کرد -\nثانیاً - اگر يك زاویۀ مثلثی قائمه باشد\nمجموع دو زاویۀ دیگر نيز يك قائمه خواهد\nبود و آن دو متمم یکدیگر اند -\nثالثاً - هرگاه مثلثی متساوی الاضلاع باشد\nهر يك از زوایای آن ۶۰ درجه است -\nاین خاصیت ترسیم ع ۱۰۴ را اثبات می نماید -\nرابعاً - هرگاه دو زاویه دردست باشد که مجموع\nشان از دو قائمه کمتر باشد همواره میتوان مثلثی\nرسم نمود که دارای آن دو زاویه باشد زاویۀ\nسیم آن نیز معلوم است -","chars":531,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00208.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/adl0946/208","canvas":"https://afghanpress.org/iiif/adl0946/canvas/208","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."}}