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Images should be drawn with a molecule editor, never freehand; ACS settings should be used for both structures and reaction schemes. These settings are normally available as templates in chemical drawing programs. Use sans-serif fonts like Arial. Indexes used for labelling must be superscripted: R 1-CH 2-R 2 (not R 1-CH 2-R 2)
For help on the process, see Wikipedia:How to draw a diagram with Inkscape. This tutorial aims to instruct a beginner on the basic principles of vector graphics using Microsoft Word (Office 97 or later). The basic principles are the same in other drawing programs such as CorelDraw or the free and open source OpenOffice.org.
An ellipsograph is a mechanism that generates the shape of an ellipse. One common form of ellipsograph is known as the trammel of Archimedes . [ 1 ] It consists of two shuttles which are confined to perpendicular channels or rails and a rod which is attached to the shuttles by pivots at adjustable positions along the rod.
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X values are always between 0 and 1. For square images, Y values are also between 0 and 1. The maximum Y value is higher for tall images, lower for wide images. The X and Y values represent the fraction of the width where the label will be placed. The exact point is the top-left corner of the image label.
The parallel projection (skew or orthographic) of a circle that is in general an ellipse (the special case of a line segment as image is omitted). A fundamental task in descriptive geometry is to draw such an image of a circle. The diagram shows a military projection of a cube with 3 circles on 3 faces of the cube. The image plane for a ...
This page is part of Wikipedia's repository of public domain and freely usable images, such as photographs, videos, maps, diagrams, drawings, screenshots, and equations. Please do not list images which are only usable under the doctrine of fair use , images whose license restricts copying or distribution to non-commercial use only, or otherwise ...
LibreOffice Draw is a free and open source vector graphics editor. It is one of the applications included in the LibreOffice suite, developed by The Document Foundation . LibreOffice Draw can be used to create complicated figures using shape tools, straight and curved tools, polygon tools, among other features.