In the literature that concerns the history of Poland, the word “gentry” appears one way or another. Most modern people have no idea what it is, but for the Poles, the class of gentry has been an integral element of national pride for many centuries. Read more "

To use presentation previews, create a Google account and log in to it: https://accounts.google.com Slide captions: Homework: 1. Exercise 4 on p. 83 2. Complete test tasks 32,25,22,31,13,3 Read more "

A quadrangular pyramid is a polyhedron whose base is a square, and all its lateral faces are identical isosceles triangles. This polyhedron has many different properties: Its lateral edges and those adjacent to them Read more "

Psychogeometry as a science appeared in the USA, its author is Stuzen Dellinger. This group of tests belongs to projective methods, i.e. a person here makes a decision under conditions of uncertainty, he does not know the interpretation of the test and cannot adjust the result to Read more "

Maintaining your privacy is important to us. For this reason, we have developed a Privacy Policy that describes how we use and store your information. Please review our privacy and communications policies. Read more "

The first historians of our civilization - the ancient Greeks - mention Egypt as the birthplace of geometry. It is difficult to disagree with them, knowing with what amazing precision the giant tombs of the pharaohs were erected. The relative position of the planes of the pyramids, their Read more "

Today we will talk about one of the most popular attractions - the Golden Triangle. This is the name of the area at the confluence of the Mekong and Ruak rivers, where the borders of three countries meet - Laos, Myanmar (Burma) and Thailand. Golden triangle Read more "

Today we will talk about one of the most popular attractions - the Golden Triangle. This is the name of the area at the confluence of the Mekong and Ruak rivers, where the borders of three countries meet - Laos, Myanmar (Burma) and Thailand. Golden triangle Read more "

Semiconductors are materials that are dielectrics under normal conditions, but become conductors with increasing temperature. That is, in semiconductors, as the temperature increases, the resistance decreases. The structure of a semiconductor using the example of Read more "

This is a system of planets, in the center of which there is a bright star, a source of energy, heat and light - the Sun. According to one theory, the Sun was formed along with the Solar System about 4.5 billion years ago as a result of the explosion of one or more supernovae. Read more "