{"book":"adl0131","page":76,"text":"کتاب ۶۵ مساحت\n\nفٹ خواهد شد -\nدر شکل دفعه (۳۸) بیان کرده شده است که مثلث الف ی د و\nب ی ج متشابه اند پس ی الف را بای د آن نسبت است که ی ج را\nبای ب است پس معلوم میشود که از روی مسئله تناسب حاصلضر\nی الف وی ب برابر حاصل ضرب ی ج وی دست مسئله متذکر ه با\nبسیار مفید و کارآمد خاصیت دائرہ است - بذریعہ مثلث های متشا\nبلندی هر اشیاء را که مطلوب داشته باشید پیمائش سایه اشیاء مطلوبه\nکرده معلوم کرده میتوانید - مثلا فرض کنید که یک چوب راست بالا\nسرزمین افتاده است و حصه طرف بالای چوب مذکور از زمین ۵ فُٹ\nبلند است و سایه چوب مذکور ۴ فٹ است در اثنائیکه سایه چوب\nمذکور را معلوم کردیم سایه یک درخت ۵۲ فٹ پیمائش\nشده است - پس بذریعه تناسب بلندی درخت مذکور را بطریق\nذیل معلوم و حل خواهیم کرد -","chars":671,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00076.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/76","canvas":"https://afghanpress.org/iiif/adl0131/canvas/76","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."}}