{"book":"adl0131","page":188,"text":"کتاب ۱۷۷ مساحت\n\nپس رقبه ذوزنقه هم ۴۱ ۳/۴ مربع فث مطلوب است.\n(۲) متوازی ضلعی یک ذوزنقه ۴۰۰ فث و ۵۱۸ فث اند\nو عمودی فاصله بینها ۲۲۱ فث است پس رقبه ذوزنقه را\nمعلوم کنید.\n۹۱۸ = ۵۱۸ + ۴۰۰\nو نصف ۹۱۸ ÷ ۲ = ۴۵۹\n۱۰۱۴۳۹ = ۲۲۱ × ۴۵۹\nپس رقبه ذوزنقه ۱۰۱۴۳۹ مربع فث است.\n(۱۵۳) قواعد دریافت کردن رقبه ذوزنقه را بطور ساده و نہایت\nآسان در دفعه (۱۵۰) ثابت کرده ایم مگر یک دیگر ثبوت عمده\nو بسیار دلکش در ذیل بیان کرده میشود.\nفرض کنید که الف ب ج د یک شکل ذواربعة الاضلاع است\nو الف ب و ج د ضلاع ذواربعة الاضلاع مذکور باهم متواز اند","chars":510,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00188.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/188","canvas":"https://afghanpress.org/iiif/adl0131/canvas/188","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."}}