{"book":"adl0131","page":189,"text":"کتاب ۱۷۸ مساحت\n\nاز نقطه تنصیف ب ج غ\nغ ک متوازی الف د بکشید\nکه از اضلاع متوازی ذوزنقه بر نقاط ه و گ یکجا شوند پس مثلث\nب غ ه و مثلث ج غ ک با هم برابر خواهند بود - و ذوزنقه\nالف ب ج د برابر است با سطح متوازی الاضلاع الف ه ک د\nو چونکه ه ب برابر است با ج ک پس از بیان مذکوره بالا نتیجه ذیل\nحاصل میشود که الف ه برابر است بانصف مجموعۀ الف ب\nو ج د - پس ذوزنقه برابر است بآن سطح متوازی الاضلاع\nکه قاعدۀ سطح متوازی الاضلاع مذکور نصف مجموعۀ اضلاع متوازی\nذوزنقه باشد - و ارتفاع سطح متوازی الاضلاع مذکور با عین\nفاصلۀ اضلاع متوازی برابر باشد و از بیان مذکور قاعده\n(۱۵۱) ثابت میشود از نقطه ع یک خط مستقیم متوازی الاضلاع\nاز الف د بر نقطه لام یکجا شده بکشید پس نقطه لام نقطه تنصیف","chars":662,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00189.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/189","canvas":"https://afghanpress.org/iiif/adl0131/canvas/189","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."}}