{"book":"adl0290","page":572,"text":"۱۰۲\n\nباب سی و دوم\n\nمسطحات\n\n(۱۷۸) در کتب علم حساب صرف بحث مساحت اشکال مستطیل و مربع میباشد مثلاً فرش و سقف و دیوار های خانه همه اشکال مستطیل میباشد و همچنان سطح صندوق و خشت نیز مستطیل است - طول و عرض مستطیل را بعدین مستطیل میگویند ÷\n(۱۷۹) احد مساحت مساحت آن مربع است که هر ضلع آن مساوی احد طول باشد ÷\nپیمایش سطوح بذریعه احاد مساحت کرده می شود چنانکه پیمایش طول بذریعه احاد طول می شود ÷\n(۱۸۰) طریق دریافت کردن مساحت مستطیل\nفرض کنید که ا ب ج د مستطیل است و طول آن ا ب = اگر ۲۰ فٹ و عرض آن ا د = ۳ فٹ","chars":496,"image":"https://storage.googleapis.com/adl-page-images/adl0290/00572.jpg","first_page":1,"last_page":1089,"title":"ʻIlm-i ḥisābعالم حساب","permalink":"https://afghanpress.org/book/adl0290/572","canvas":"https://afghanpress.org/iiif/adl0290/canvas/572","source":"https://afghanistandl.nyu.edu/books/adl0290/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0290_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."}}