{"book":"adl0131","page":37,"text":"کتاب ۳۶ مساحت\n\nو د الف ج هر یک مثلث با مثلث الف ب ج مشابه خواهد بود آ ب\nو این هر دو مثلث یعنی د ب الف و د الف ج نیز با هم مشابه خواهد بود.\n۳۸- فرض کنید که الف ب و ج د دو وتر دائره اند که با هم یکدیگر را\nبر نقطۀ ی در حالت ضرورت خارج شده قطع میکنند و ب ج و الف د\nبا هم یکجا کرده شده اند پس مثلث الف ی د و ب ی ج مشابه\nخواهند بود و زاویه ہائی ی الف د و ی ج ب باهم برابر خواهند بود و نیز\nزاویه های د الف و ی ب ج متساوی خواهند بود (دفعه ۳۲ را ملاحظه کنید)\n\nفصل سوم عملی هندسه مسلجات\n\n۳۹- بعض عملی هندسۀ مسلجات را حل نموده مینویسیم که برائی کشیدن\nدرست و صحیح اشکال کارآمد و مفید باشند. بخیال مایان از آلات صرف\nپرکار و رولر یعنی مسطر برای این مطلب کافیست گو بعض اوقات\nدیگر آلات مثل مربع یا متوازی رولر بکار می آیند تا چندان ضروری نیست\n\nبطریقہ که","chars":737,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00037.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/37","canvas":"https://afghanpress.org/iiif/adl0131/canvas/37","source":"https://afghanistandl.nyu.edu/books/adl0131/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0131_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."}}