{"book":"adl0290","page":573,"text":"۱۰۳\nا ۵ فٹ ب\n۳ فٹ\nد ج\nاگر اعد طول یک فٹ باشد مقدار ا ب پنج\nچند این احد است و مقدار ا د سه چند آن :\nپس ا ب را در ۵ و ا د را در ۳ حصه تقسیم\nکنید و از نقاط تقسیم خطوط متوازی ا د و ا ب\nبکشید به این طریق مستطیل ا ب ج د در ۱۵\nمربع مساوی تقسیم میشود که ضلع هر یکی از انها یک\nفٹ میباشد چونکه هر مربع مذکور احد مساحت است\nبنابرین مساحت ا ب ج د مساوی ۱۵ مربع\nفوق ست یعنی مساحت ا ب ج د = ۵ × ۳\n= ۱۵ مربع فٹ\nقاعده : مساحت مستطیل = طول × عرض\n:. طول = مساحت ÷ عرض\nو عرض = مساحت ÷ طول\nتنبیه - یاد باید داشت که یک مربع فٹ\nآن مربع است که هر ضلع آن یک فٹ باشه","chars":540,"image":"https://storage.googleapis.com/adl-page-images/adl0290/00573.jpg","first_page":1,"last_page":1089,"title":"ʻIlm-i ḥisābعالم حساب","permalink":"https://afghanpress.org/book/adl0290/573","canvas":"https://afghanpress.org/iiif/adl0290/canvas/573","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."}}