The square represents the correct quadrangle (or a rhombus) in which all corners are straight lines, and the parties are equal among themselves. As well as at any other regular polygon, at a square it is possible to calculate perimeter and the area. If the area of a square is already known, then to find its parties, and then and the perimeter is possible.
Instruction
1. square Square ison a formula: S = a²Это means that to calculate the area of a square, it is necessary to increase lengths of two of its parties at each other. As a result, if to know the area of a square, then at extraction of a root from this value it is possible to learn length of the party of a square. Example: the area of a square of 36 cm² to learn the party of this square, it is necessary to take a square root from value of the area. Thus, length of the party of this square of 6 cm
2. For finding of perimeter of a square it is necessary to put lengths of all its parties. By means of a formula it can be expressed so: P = a+a+a+a. If to take a root from value of the area of a square, and then to put the turned-out size 4 times, then it is possible to find square perimeter.
3. Example: The square with an area of 49 cm² is given. It is required to find its perimeter. Decision: At first it is necessary to take a root of the area of a square: √49 = 7 smzaty, having calculated length of the party of a square, it is possible to calculate also perimeter: 7+7+7+7 = 28 smotvt: the perimeter of a square of 49 cm² makes 28 cm