{"book":"adl0131","page":185,"text":"کتاب ۱۷۴ مساحت\n\nب و دستوازی الف ج خطوط مستقیم بکشید پس یک سطح\nقائم الزاویه ک ل م ن تیار خواهد شد پس ظاهر است که مثلث\nالف ی ب برابر است به مثلث ب ک الف و مثلث ب ج ی\nمساوی است به مثلث ج ل ب-\nومثلث ج ی د برابر است به مثلث د م ج و مثلث د ی الف برابرست\nبه مثلث الف ن د پس سطح ذواربعه الاضلاع الف ب ج د از سطح\nقائم الزاویه ک ل م ن نصف است پس رقبه ذواربعه الاضلاع\nنصف حاصل ضرب الف ج و ب د است-\n(۱۴۹) وترهائی هر یک معین یک دیگر را بر زاویه‌های قائه\nقطع میکنند پس رقبه معین بذریعه قاعده مذکوره بالا معلوم کرمیشود\n(۱۵۰) برای دریافت کردن رقبه‌های ذوزنقه استعمال خاص از\nقواعد بضرورت می‌آید پس بیان دریافت کردن رقبه ذوزنقه\nدر ذیل آورده میشود-","chars":629,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00185.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/185","canvas":"https://afghanpress.org/iiif/adl0131/canvas/185","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."}}