{"book":"adl0919","page":107,"text":"٩٤\nیاد و ازان برابر همدیگر، و یا هر سه مختلف باشند، قسم\nاوّل را متساوی الاضلاع، و قسم دوّم را متساوی الساقین\nو سوم را مختلف الاضلاع خوانند، و چون زاویۀ\nهم ازین سه قسم بیرون نمی باشند که قائمہ باشند،\nیا منفرجه، یا حاده، و در شکل (٣٢) مقاله اول اقلیدس\nثابت شده که هر سه زاویۀ هر مثلث برابر دو قائمہ است\nپس اگر یکزاویۀ مثلث قائمہ باشد، دوی دیگر آن بالضروره\nحاده خواهند بود، که آن هر دو چون جمع شوند برابـر\nیک قائمہ میباشند، لهذا آن مثلث را بنام یک\nزاویۀ کلان یاد می کنند، یعنی مثلث قائم الزاویہ\nگویند .","chars":499,"image":"https://storage.googleapis.com/adl-page-images/adl0919/00107.jpg","first_page":1,"last_page":181,"title":"Ṭarz-i amānī dar taʻlīm-i ibtidāʼi ʻaskar-i ummī طرز امانى در تعليم ابتدائى عسکر امى","permalink":"https://afghanpress.org/book/adl0919/107","canvas":"https://afghanpress.org/iiif/adl0919/canvas/107","source":"https://afghanistandl.nyu.edu/books/adl0919/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0919_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."}}