{"book":"adl0131","page":182,"text":"کتاب\n١٧١\nمساحت\n\n(١۴۵) ہر یک ذو اربعة الاضلاع از کشیدن وتر بدو مثلث تقسیم\nکرده میشود و رقبهٔ ہر یک مثلث جدا جدا معلوم کرده میشود پس\nمجموعه رقبه های ہر دو مثلث ہا رقبهٔ ذو اربعة الاضلاع خواهد بود.\n\n(١۴۶) تمثیلات\n(١) الف ج وتر یک شکل ذو اربعة الاضلاع الف ب ج د ١٢ فُت ست\nو عمود ب ی ٣ فت و عمود د ف ۴ فت است پس رقبهٔ ذو اربعة الاضلاع\nمذکور را دریافت کنید.\nرقبهٔ مثلث الف ب ج =\n۱/۲ × ۱۲ × ۳ = ۱۸\n\nرقبهٔ مثلث الف ج د =\n۱/۲ × ۱۲ × ۴ = ۲۴\nو مجموعهٔ ۱۸ + ۲۴ = ۴۲\nپس رقبه ذو اربعة الاضلاع مذکور ۴۲ مربع فت است.","chars":500,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00182.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/182","canvas":"https://afghanpress.org/iiif/adl0131/canvas/182","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."}}