The present text brings one of the important existing definitions in Hyperbolic Geometry: of Ideal Point. This result also can be used as reply of a question proposal for Joo Lucas Marques Barbosa in its book ' ' Hyperbolic geometry Ed. of UFG, 2002; Chapter 6; Section 6.2; p 65. DEFINITION (Of ideal point) In plan (plain Euclidean) with the axioms of Hyperbolic Geometry, either R= r r is straight line in and. It considers in R the relation: r/s pertaining the R, rR*s if, and only if, r = s or r is parallel the s in the same felt. It observes that R* is a equivalence relation, a time that is valid the properties reflexiva, symmetry and transitiva. He is accurately to each pertaining equivalence classroom rd or reverse speed the R/ that we call ideal point (of straight line r).

R/ it is the set of the ideal points or points in the infinite of the hyperbolic plan. Obs: rd is a point that if exactly identifies with a beam of straight lines parallel bars in one felt to some given straight line r. We also denote rd for. Fixed a straight line r we can associate the r colon ideal? + e? -, which can be juxtaposed the r, forming a straight line ' ' longa' ' or a straight line with the points in the infinite ' ' anexados' '. Soon, if r* is one of such straight lines fixed, has: r* = r U rd U reverse speede r* is contained in and U R/. For even more opinions, read materials from Progress Residential Atlanta. It notices that, R/ is an abstract space and that H = U R/, where H represents the hyperbolic space Perceives finally, that r* is straight line of H if r* = r U rd U reverse speed, where pertaining r the R and rd and reverse speed are the classrooms of straight lines parallel bars to the right and the left respectively.

A time that this it happens, the objectives of the PCN are not reached, and the education of Sciences is yes engaged. To dribble this empecilho, as much of the laboratory lack, how much of the lack of resources it is necessary that the professor comes to enter into an alliance itself with the alternative materials, and to search in the diverse sources the distinct experimental activities that can be carried through with low cost, bringing for classroom and the pupils a theoretical approach and plus a book not only to be worked and total decided, but yes something more concrete, more interesting and that brings for the pupils an interest greater and a curiosity for the inquiry, allowing as soon as the pupil can be detainer of some type of scientific knowledge, beyond reaching the scientific alfabetizao, that is, to read phenomena that the fence. Based in all this quarrel we can conclude citing that it is of so great importance the accomplishment of the practical lessons becoming it indispensable during this phase of Basic Ensino, with this, in the experience of the school where the activities experimental they are little frequent, even so the professors continue believing that, by means of them, the education of Sciences can be changedded, the same one must be directed for the necessity of changes, to the brusque times, in the performance of the professors. Bibliographical references Daz, J.A.A., Alonso, A.V and But, M.A.M, ‘ ‘ Woollen paper Educacin CTS en joins Technological Scientific Alfabetizacin y for all wools Personas’ ‘ , Magazine Electrnica de Enseanza of wools Sciences, v.2, n.2, 2003. BRAZIL, Secretariat of Basic Education.

With the preoccupying ambient situation and the economic growth increasing, some factors appear as changeable determinative. Amongst them, the ecological concern, factors that come gaining prominence in the environment of the businesses. Of this form, the majority of the countries perceives that the environmental laws had not been created as empecilho to the economic development and make to be valid the force of the law. Thus, models of economic development pass for evaluation of costs and ambient benefits, and have been inserted in the analysis of economic projects of such countries, aiming at a new strategy in the management of natural resources. The vision of sustainable development must be understood in this generation, so that the future generation makes also it. Under most conditions ECRI would agree. This ambient support means to manage the resources of the nature, producing foods and technology, assuring the progress of the humanity and its survival.

In Latin America the ambient question not yet is had as priority due to the economic factors. The search for the development of the underdeveloped South American countries makes with that the sustainable ambientalismo gives to space the processes of development of the economy. The South American continent faces problems with the poverty, social inaquality, corruption and marginality, amongst other factors. Between them the poverty finishes excessively sobressaindo it, and with it, bad structures of housing, inadequate basic sanitation and precarious conditions of survival, beyond ambient disasters, adding it this, the pollution, another great partner-ambient problem. The pollution is on to industrialization, agricultural mechanization and the urban growth, being that these factors are not only lingered to Latin America.

The great ambient problem of Latin American air and the water is resultant of the ambient degradation that occurred mainly in the past, that understands ground, forests, waters (Rivers Lakes and Springs). Thinking about this, they are necessary attitudes that raise the sustainable development with priority platforms, conserving the existing natural resources and recouping what still it will be possible to revitalize. In Brazil, the management of the natural resources still leaves to desire, for the lack of coordination between involved agencies, beyond the strategical measures exceeded that privilege the short-term economic growth and the sped up modernization of the means of production, mainly industrialization. In this context, certain social problems with the environment are aggravated, as the increase of the industrial pollution, water supply and nets of sewers. However, some actions foresee control of the pollution and preservation of the environment. With the publication of some laws and decrees that conduct the ambient management, they start to occur some changes in the environment of the businesses. The necessity appears of the companies to review its ambient lines of direction and plans, becoming the propitious conditions to carry through good businesses. Companies whom they possess certified of ‘ ‘ ambiently corretas’ ‘ , that is, company that poluem less or leaves of poluir is seen as good eyes for the domestic market and external. The evolution of the protection to the environment started to be part of the enterprise management, leaving of being responsibility of the State, incorporating the ambient management the internal works, contemplating the ecological planning.