{"book":"adl0131","page":41,"text":"مساحت\n\nدست معلومه خطوط مستقیم باید که این شرط ضرور باشد که دو خط با هم\nیکجا شده از خط سوم کلان باشند.\n۳- بیک خط مستقیم معلوم مثلث متساوی الاضلاع بسازید. فرض کنید که\nالف ب خط مستقیم معلوم است\nنقطه های الف و ب را مرکز و خط الف و ب را نصف قطر تصور نموده دو قوس\nبکشید که به نقطه ج تقاطع کنند یکجا کنید خطوط الف ج و ب ج\nپس الف ب ج مثلث مطلوب خواهد بود.\n۴- از نقطه معلومه متوازی\nخطوط مستقیم معلوم یک خط مستقیم بکشید.\nفرض کنید که الف نقطه و ب ج خط مستقیم معلوم است در خط ب ج\nنقطه د بگیرید و نقطه د را مرکز و خط د الف را نصف قطر تصور نموده\nیک قوس بکشید که خط ب ج را به نقطه ی قطع کند و الف ی وتر\nبکشید باز از مرکز الف به نصف قطر الف د دائره بکشید و این وتر وقت\n\nبا پردگار","chars":663,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00041.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/41","canvas":"https://afghanpress.org/iiif/adl0131/canvas/41","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."}}