you need
• - line;
• - a topographical map;
• - Calculator.
Guide
1
To find width of the rectangle, measure the direction that is parallel to the line of sight of the observer (out vertically).Conventionally, the either side of the rectangle can be regarded as its width, while the adjacent side is the length of the figure.Most often, the width of the take the short side of the rectangle.At a certain perimeter of a rectangle and its length, width calculate yourself.To do this, divide the perimeter P 2, and subtract the result from the length of the rectangle a (b = P / 2-a).If this area is known geometrical figu
res S, then its width will be equal to the length of the area ratio (S = b / a).
2
Another figure, which is used for the width of the concept - a box.Its width equal to the width of the rectangle, which lies at the bottom.Therefore, in order to find this quantity for the box, get width of its base.Do this by the methods described in the previous step.
3
If you know the volume V, the length a and the height h of the box, then get its width , sequentially dividing the volume by the length and height b = V / (a ​​• h).
4
To measure the width of any other geometric shape or physical body, find its longitudinal and transverse dimensions.One of them is the length and the width of the other.For example, measuring the longitudinal dimension of the car, you get the length and cross - width .The width of the airplane is equal to the span of its wings, etc.The only exception is the circle in which all the dimensions are equal to its diameter.
5
To find width some of the relief, for example, the river on a topographical map, check it out.Then, using a ruler, get this value and multiply on the map to zoom.Get width of the river at this point.For example, on a map scale of 1: 50,000 the width of the river is 2 cm. 2 Multiply 50,000 and get river width • 2 = 50000 = 100000sm 1km.The same procedure is used to determine the width of any other object on the map.