Posters by Tessellations

Tessellations in Our World poster $11.95 Poster with nine photographs illustrating the occurance of tessellations in natural and manmake objects. Comes with an 8-page lesson guide, including four copyable worksheets. 22" x 34".	Polyhedra in Our World Poster $11.95 Poster with ten photographs illustrating the occurance of polyhedra in natural and manmake objects. Comes with an 8-page lesson guide, including five copyable worksheets. 22" x 34".	Fractals in Our World poster $11.95 Poster with a number of photographs illustrating the role of fractals in natural and manmade objects. Comes with an 8-page lesson guide, including four reproducible worksheets. 22" x 34".
Regular Polygon Tessellations poster $11.95 Colorful poster showing a variety of tessellations of regular polygons. Comes with an 8-page lesson guide, including five copyable worksheets. 22" x 34".	Symmetry in Tessellations poster $11.95 A variety of lifelike tessellations illustrate different types of symmetry. Comes with an eight-page lesson guide, including four copyable worksheets. 22" x 34".	The Circles of Descartes poster $11.95 This poster describes the Descartes Circle Theorem and shows some of the beautiful and complex figures, known as Apollonian packings, that can be created using the theorem. In the early part of the 17th century, RenŽ Descartes described a simple relationship between the curvatures of four mutually tangent circles. Given the curvatures of three of the circles, it is possible to calculate the curvature of the fourth by a straightforward solution to a quadratic equation. (It may be the coolest thing you'll ever see done with a quadratic equation!) This allows the construction of fascinating figures know as Apollonian packings, in which an infinite number of circles fit inside a large outer circle. In fact, there are many Apollonian packings for which every circle has integer curvature. Some arrangements lead to intriguing number sequences, such as the squares (1, 4, 9, 16, 25 ...). Grades 7-12. 22" x 34".