{"book":"adl0938","page":662,"text":"۶۵۵\n\nو یک مثلث متساوی الاضلاع و یک مثلث منفرج الزاویه\nمهیا نماید ، و بر تخته سیاه تشریح بیان کند. که یک مثلثی\nبذرایعه دست چپ محکم میگیرند، و بدست راست\nمثلث دیگر را متحرک میسازند. در وقت مشق طلاب\nترتیب ذیل را اختیار باید کرد :-\n(۱) بر کدام زاویه خطوط متوازی رسم کردن\n(۲) ساختن زوایا، و تصور درست معنی اصطلاحات\nمختلف را قائم نمودن ۔ اگر مدرس بر مقامات\nمختلف زوایای قائمه و منفرجه و حاده\nرسم کرده پس مستقیم خطوط رسم کند که چون آنها\nیکدیگر را قطع کنند زوایای قائمه و منفرجه و حاده\nپیدا میشود، پس اینطور معنی اصطلاح زاویه بر دلهای\nطلاب بخوبی نقش خواهد شد.\n(۳) معنی لفظ عمودی را خیلی باحتیاط بیان باید کرد\n(۴) اشکال مربع و مستطیل و مثلث ها را بر جای مختلفت تخته سیاه","chars":660,"image":"https://storage.googleapis.com/adl-page-images/adl0938/00662.jpg","first_page":1,"last_page":719,"title":"ʻIlm al-taʻalīm عالم التعليم","permalink":"https://afghanpress.org/book/adl0938/662","canvas":"https://afghanpress.org/iiif/adl0938/canvas/662","source":"https://afghanistandl.nyu.edu/books/adl0938/","source_pdf":"https://afghanistandl.nyu.edu/pdf/adl0938_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."}}