{"book":"adl0946","page":146,"text":"۱۳۹\nتا در نقطه م متقاطع شوند ه م منصف الزاویه مطلوب\nاست .\nمسائل\n١١ - ثابت کنید که اگر مثلثی محور تناظری قبول کند قطعاً\nمحور مذکور از یکی از رؤس آن مثلث عبور خواهد\nنمود .\n١٢- مثلثی رسم کنید که ارتفاع و میانه آن یکی باشد\nبعد ثابت کنید که آن مثلث متساوی الساقین\nاست .\n١٣ - دو میانه مثلث متساوی الساقینی را از دو زاویه\nمساوی رسم می کنیم ثابت کنید که آنها با هم مساویند\nو در روی محور تناظر یک دیگر را قطع می کنند .\n۱۴ - دو ارتفاع مثلث متساوی الساقینی را از زاویه\nمساوی رسم می کنیم ثابت کنید که آن دو با هم","chars":500,"image":"https://storage.googleapis.com/adl-page-images/adl0946/00146.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/adl0946/146","canvas":"https://afghanpress.org/iiif/adl0946/canvas/146","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."}}