{"book":"adl0131","page":204,"text":"کتاب ۱۹۲ مساحت\n\nمتساوی الاضلاع مثلث ها تقسیم میشود بانقسیم که از نقطه م تا نقاط الف\nو ب و ج و د و ی و ف خط مستقیم بکشید پس بموجب دفعه (۴۴)\nرقبه هر یک مثلث متساوی الاضلاع در پیمانه مربع فُٹ ۳/۴ جذر ۳ است\nیعنی ۳/۴ جذر ۳ است -\n(۲) یک شکل منتظم که ۱۲ اضلاع دارد اندرون دائره ساخته شده است\nو نصف قطر دائره یک فُٹ است پس رقبه شکل مذکور را\nمعلوم کنید- در دفعه (۹۹) ثابت شده است که الف ط\nیک ضلع شکل منتظم که ۱۲ اضلاع دارد میباشد که اندرون دائره\nساخته شود پس رقبه شکل از رقبه مثلث الف م ط دوازده\nچند است - لاکن رقبه مثلث الف م ط = ۱/۲ م ط x الف ل\n(چرا که م ط قاعده و الف ل عمود است) و م ط = یک فُٹ\nو الف ل = ۱/۲ x الف ف = ۱/۴ فُٹ پس رقبه مثلث الف م ط\n۱/۸ مربع فُٹ پس رقبه شکل منتظم که ۱۲ اضلاع دارد و اندرون دائره ساختہ","chars":710,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00204.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/204","canvas":"https://afghanpress.org/iiif/adl0131/canvas/204","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."}}