{"book":"adl0946","page":212,"text":"۲۰۵\nاین مسئله در هر سه ضلع مثلث ثابت است پس میگوئیم\nکه مثلث\nکثیر الاضلاع\nمحدبی است\nوبطور عمومی ل\nمیگوئیم - س ۱۷۹\nکثیر الاضلاع محدب آن است که چون يك\nضلع آن را از هر دو طرف امتداد دهیم تمام کثیر\nالاضلاع در يك طرف آن واقع شود -\nبعبارة اخری اگر هر ضلع کثیر الاضلاع را امتداد دهیم\nخطی که حاصل می شود در کثیر الاضلاع داخل نشود آن کثیر\nالاضلاع محدب است -\nمثلاً كثير الاضلاع ۱ ج د ل م (س ۱۸۰) محدب است\nوكثير الاضلاع ۱ ج د ل محدب نیست (س ۱۸۱)\n۲۴۳ - زاویه خارجی کثیر الاضلاع محدب - ضلع","chars":475,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00212.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/adl0946/212","canvas":"https://afghanpress.org/iiif/adl0946/canvas/212","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."}}