A set of number rays showing either no numbers at all, numbers from 0 to 10 or numbers from -5 to 5. Useful to understand and practise the use of integer numbers. antal linje matematik Uppsättning av antal strålar
Note the thumbnail below is a degraded version of the actual image which is much sharper. A Necker cube is basically a wireframe drawing of a six-sided cube such that it has no perspective as to whether you're looking at it from the top or from the bottom. This is an example of two exactly identical necker cubes, the one on the left showing an intermediate object going in "down from the top" while the one on the right shows the object going in "up from the bottom" which shows how the image can change its perspective simply by changing which face (front or back) appears behind the intervening object. kub neckers kub optisk illusion 2 Necker kuber
Paper model of a cube. Modelo de papel de um cubo. papper modell kub matematik Papper modell av en kub
A set of 3 Geometry shapes floating in mid-air on a metallic platform. Drawn with Inkscape. lantmätare geometriska form Geometri 2
An example of a necker cube and an Impossible cube (one arm runs across the other but is still straight, which can't happen in 3D; it's an optical illusion). kub neckers kub optisk illusion Neckers kub och omöjlig kub
The difference of two cubes. Typeface is Tuffy (public domain, created by Thatcher Ulrich) from openfontlibrary.org kub skillnaden relativa komplement Differensen av två kuber
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A set of 3 Geometric shapes floating in mid-air. Drawn with Inkscape. lantmätare geometriska form Geometri 3
A set of 3 Geometry Shapes floating in mid-air with a metallic floor and a metallic graph in the background. Drawn with Inkscape. lantmätare geometriska form Geometri 4
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Paper model of a tetrahedron. Modelo de papel de um tetraedro. papper modell matematik lantmätare Papper modell av en tetraeder
A set of 3 Geometry Shapes floating in mid-air. Drawn with Inkscape. lantmätare geometriska form Geometri 1
The magic constant of this square is 34. Besides its four corners sum 34, the four central number sum 34, the four middle numbers of upper and lower rows sum 34 like the four middle numbers of the columns left and right. If we divide the square into four squares have the numbers that make up each added 34. torget matematik Magisk kvadrat
A parabola on a Cartesian coordinate grid. Typeface is Tuffy (public domain, created by Thatcher Ulrich) from openfontlibrary.org liknelsen math matematik Liknelsen