{"book":"adl0131","page":61,"text":"کتاب ۵۰ مساحت\n\nفرض کنید که الف ب = ۵۶ بموجب دفعه ۶۰ ب د را دریافت میکنیم\n\nج د = ۱۵\nب ج = ۲۵\n۴۰ = ۱۵ + ۲۵ حاصلضرب ۴۰ × ۱۰ = ۴۰۰ } ب د = ۲۰\n۱۰ = ۱۵ - ۲۵ جذر ۴۰۰ = ۲۰ } الف ج = ۲۹\nپس ب د = ۲۰ فت جواب مطلوب است\n\nبموجب قاعدۀ (۵۵) الف ج را معلوم میکنیم\nمربع ۳۶ = ۱۲۹۶ ۱۵۲۱ = ۲۲۵ + ۱۲۹۶\nمربع ۱۵ = ۲۲۵ جذر ۱۵۲۱ = ۳۹\n\nپس الف ج = ۳۹ فت\n\n(۶۵) (ب) قواعد مذکوره بالا و نیز چند قواعد دیگر که متعلق به\nمثلث قائم الزاویه میباشند یکجا نموده در ذیل مینویسیم تا که طالبان\nدر یاد داشت قواعد ذیل آسانی دست دهد ـ تمثیلات هر یک قواعد از\n\n( سوالات","chars":523,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00061.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/61","canvas":"https://afghanpress.org/iiif/adl0131/canvas/61","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."}}