{"book":"adl0131","page":19,"text":"کتاب\nمساحه\nآنرا در میان می نویسند و بهر دو سمت آن دو حروف نوشته\nمیشوند و از آنها یک حرف بمقام خط مستقیم و حرف دیگر به دوم\nمقام خط مستقیم نوشته میباشد مثلا که ف ی ع آن زاویه ست\nکه از دو خطوط مستقیم ف ی و ع ی تیار میشوند و انه ی ج\nآن زاویه فهمیده میشود که از دو خطوط مستقیم ع ی و ج ی پیدا میشوند\nو از ف ی ج آن زاویه مراد است که از دو خطوط مستقیم ف ی و ج ی\nساخته شده است.\n٦ـ اگر یک زاویه بالای دیگر زاویه اینطور مانده شود که همان خط که از\nیک زاویه پیدا میشود به خطوطیکه از انها زاویه دیگر پیدا میشود برا\nمنطبق شوند گفته میشود که زاویه با با هم برابر اند مثلا اگر خط ج ب را\nبر خط ف ی این قسم ایستاده کنیم که نقطه ب بر نقطه ی باشه\nو محیط الف ب بر خط دی منطبق شود گفته می شود که\nزاویه الف ب ج برابر زاویه دی ف میباشد برای مبتدی میگو\nافی نوت","chars":734,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00019.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/19","canvas":"https://afghanpress.org/iiif/adl0131/canvas/19","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."}}