Presently a general computerization and high technologies it is impossible to do without good knowledge of mathematics. Representatives of many professions need ability to consider, to think, find logical and rational solutions of tasks. The foundation of understanding of mathematics is laid even during training at school. The modern school student with the solution of a set of mathematical tasks, equations or examples is helped by the developed order or an algorithm of performance of actions.

We often face degrees in various areas of life and even in life. When it comes to meters square or cubic, it is told about number too in the second or third degree when we see designation very small or on the contrary big sizes, it is often used 10^n. And, of course, there is a set of formulas with participation of degrees. And what actions with degrees are possible and how them to consider?

The isosceles trapeze is a trapeze at which the opposite nonparallel parties are equal. A number of formulas allow to find the area of a trapeze through its parties, corners, height and. etc. For a case of isosceles trapezes these formulas can become simpler a little.

At the solution of geometrical tasks it is necessary to find some sizes if others are known. So, for example, if three parties of a triangle are set, then on them it is possible to calculate all its other characteristics. However, knowing the area of a triangle, it is impossible to count length of its parties (generally). And here if the area of a square is known, to find its party very easily.