Dividing angles
We know, that the angle is part of the plane, which is bounded by two rays coming from one point, called the vertex of the angle. Any angle can be divided into halves. For this purpose, from point A …
Author: max
Dividing episodes
Dividing episodes
If you want to divide the segment AB into two halves, arcs with a radius greater than half of the segment AB should be drawn from points A and B. We mark the intersections of the arcs with points C and D. By connecting them together, we get the intersection of the line connecting with …
Draw a perpendicular line
Draw a perpendicular line.
A line perpendicular to a given straight line can be drawn in two ways. The first is to draw a perpendicular from a specific point lying on the line p, second – from the point outside the straight line p. We will use a compass to plot both constructions …
Draw grids for different charts, sketches
Draw grids for different charts, sketches.
It is often necessary to draw grids for different graphs, sketches, subtitles, decorative projects etc.. The grid can consist of square grids made of drawing vertical and horizontal lines at equal intervals (Figure A) or also …
Line drawing
Line drawing
The easiest way to draw horizontal lines is with the help of a fence (Figure A), by guiding the pencil or graphion close to the upper edge of the ruler and keeping it constantly at the same angle of inclination to the plane of the paper, without tilting it …
Drawing circles – drawing a circle
Drawing circles – drawing a circle
A zero caliper is used to draw circles with small radii. In some drawings, these small circles mark the main points or intersection points, circles and rays.
Figure a shows how to use it …
Basic drawing exercises
Basic drawing exercises
When drawing basic geometric figures, we most often use a drawing board, a fence and right triangles with angles of 45 °, 60 ° and 30 °.
The figure shows the most common ways of drawing with sets of triangles using a drawing board and a fence.
Drawing paper or …
Initial drawing exercises
Initial drawing exercises
Let's start the initial drawing exercises with the simplest geometric element, what is the point, and let us illustrate its position on any surface with a few examples. Let's think about it, how to arrange one, two, three and many points, that they constitute ordered systems. Point …
Visual illusions
Visual illusions
Optical illusions they are visual perceptions ascribing property to the viewed object, which are not really there. The causes of optical illusions are generally not known yet; only known, with the psychological factor playing a decisive role. Most optical phenomena are associated with …
Bolek and Lolek
Bolek and Lolek
Bolek i Lolek is a Polish animated fairy tale. The main characters are little boys: Bolek, taller and slimmer, dressed in red shorts and a yellow sweatshirt and Lolek, lower and heavier, ubrany w fioletowe spodnie na szelkach i biały podkoszulek.…