maths in nature (complete)

Views:
 
Category: Education
     
 

Presentation Description

No description available.

Comments

By: su25 (23 month(s) ago)

i want this ppt to u.can u give to me

Presentation Transcript

PowerPoint Presentation:

Maths in Nature Made by:- Abhay goyal X-B 754 Symmetry in nature

PowerPoint Presentation:

Mathematics is all around us. As we discover more and more about our environment and our surroundings we see that nature can be described mathematically. The beauty of a flower, the majesty of a tree, even the rocks upon which we walk can exhibit nature's sense of symmetry. Although there are other examples to be found in crystallography or even at a microscopic level of nature, we have chosen representations within objects in our field of view that exhibit many different types of symmetry. 1.Bilateral symmetry 2. Radial symmetry 3. S trip patterns 4. W allpaper patterns INTRODUCTION

PowerPoint Presentation:

Radial symmetry is rotational symmetry around a fixed point known as the center. Radial symmetry can be classified as either cyclic or dihedral. Cyclic symmetries are represented with the notation Cn, where n is the number of rotations. Each rotation will have an angle of 360/n. For example, an object having C3 symmetry would have three rotations of 120 degrees. Dihedral symmetries differ from cyclic ones in that they have reflection symmetries in addition to rotational symmetry. Dihedral symmetries are represented with the notation Dn where n represents the number of rotations, as well as the number of reflection mirrors present. Each rotation angle will be equal to 360/n degrees and the angle between each mirror will be 180/n degrees. An object with D4 symmetry would have four rotations, each of 90 degrees, and four reflection mirrors, with each angle Radial symmetry

PowerPoint Presentation:

1.A starfish provides us with a Dihedral 5 symmetry. Not only do we have five rotations of 72 degrees each, but we also have five lines of reflection. 2.Another example of a starfish - as we can see, starfish can be embedded in a pentagon, which can then be connected to the Golden Ratio ...

PowerPoint Presentation:

3.Jellyfish have D4 symmetry - four rotations of 90 degrees each. It also has four lines of symmetry, and in the middle you have a four-leafed clover for good luck 4.Hibiscus - C5 symmetry. The petals overlap, so the symmetry might not be readily seen. It will be upon closer examination though

PowerPoint Presentation:

Strip pattern symmetry can be classified in seven distinct patterns. Each pattern contains all or some of the following types of symmetry: Translation symmetry, Horizontal mirror symmetry, Vertical mirror symmetry, Rotational symmetry, or Glide reflection symmetry. The seven types are T, TR, TV, TG, TRVG, TGH, and TRGHV.

PowerPoint Presentation:

1.An Eastern White Pine has interesting symmetry on it's trunk. Each year, as the tree grows, it develops a new ring of branches (most of which have been broken off in the picture above). The rings move up by similar translation vectors, but some variation occurs due to the conditions for that year. 2.Another picture of the white pine - this time with branches showing. The white pine exhibits T symmetry

PowerPoint Presentation:

3.The copperhead is one of the four poisonous snakes in the United States. Can you name the other three? Highlight the text between the arrows for the answer: >> The Cottonmouth (Water Mocassin ), Rattle Snake, Coral Snake << As with most snakes, it has TRGHV symmetry. The black rat snake is a non-poisonous snake, and like the copperhead (and most other snakes with patterns), it has TRGHV symmetry.

PowerPoint Presentation:

Wallpaper patterns are patterns of symmetry that tessellate the plane from a given fundamental region. There are seventeen different types of wallpaper patterns. In the examples below, you will see the fundamental regions highlighted, as well as the translation vector generators that can be used to complete the pattern by translation, after the other isometries of the pattern are completed

PowerPoint Presentation:

1.The Giant's Causeway , located in Ireland, is an fascinating *632 formation found in nature. It is a collection of hexagons tesselating the ground - even in 3D at some points. 2.Bees form their honeycombs in a *632 pattern as well. There seems to be a lot of hexagonal symmetry in nature. Any conjectures on why that's the case? The answer lies with steiner points and minimal networks.

PowerPoint Presentation:

Bilateral symmetry is symmetry across a line of reflection. Are people symmetric? We think we are, but upon closer analysis, we are less symmetric than we think. The more simple the creature (ants --> elephants), the more likeley it is that it will be perfectly symmetric. We took two professors, cut and pasted half of their head in Photoshop, and flipped that half horizontally. We then aligned the two halves so that it came closest ro resembling a human head. You be the judge on how good of a job we did and how symmetric people around us are in general ...

PowerPoint Presentation:

Many mathematical principles are based on ideals, and apply to an abstract, perfect world. This perfect world of mathematics is reflected in the imperfect physical world, such as in the approximate symmetry of a face divided by an axis along the nose. More symmetrical faces are generally regarded as more aesthetically pleasing

PowerPoint Presentation:

Symmetry is the ordering principle in nature that represents the center of balance between two or more opposing sides. As a fundamental design principle, it permeates everything: from man-made architecture to natural crystalline formations. In nature, symmetry exists with such precision and beauty that we can't help but attribute it to intelligence-such equal proportions and organization would seem to be created only on purpose. Consequently, humans have borrowed this principle for its most iconic creations and symbols. conclusion

authorStream Live Help