{"book":"adl0131","page":22,"text":"کتاب ۱۱ مساحت\n\nواگر شش اضلاع داشته باشد آنر مسدس میگویند وعلی هذا القیاس-\nكثير الاضلاع منتظم آن شکل را گویند که همه اضلاع آن و زاویه های او با هم برا\nباشند\n\n۱۱- مثلث بچند اقسام مختلف میباشند- مثلث متساوی الاضلاع آن\nمثلث را گویند که هر سه اضلاع او با هم برابر باشند-\nمثلث متساوی الساقین آن مثلث را گویند که دو اضلاع او با هم برابر باشد\n\nمثلث مختلف الاضلاع آن مثلث را گویند که\nهر سه اضلاع او با هم برابر نباشند- مثلث قائم الزاویه آن مثلث را\nگویند که یک زاویه او قائمه باشد- و در مثلث قائمه الزاویه مستقیم خطوط\nمتصل زاویه قائمه را اضلاع و خط رو بروی او را وتر می گویند-\nمثلث منفرجه الزاویه آنرا گویند که یک زاویه او منفرجه باشد\nمثلث حاده الزاویه آنرا گویند که هر سه زاویه او حاده باشند","chars":682,"image":"https://storage.googleapis.com/adl-page-images/adl0131/00022.jpg","first_page":1,"last_page":381,"title":"Kitāb-i ʻIlm i masāḥat کتاب عالم ا مساحت","permalink":"https://afghanpress.org/book/adl0131/22","canvas":"https://afghanpress.org/iiif/adl0131/canvas/22","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."}}