Ray figure geometry9/14/2023 ![]() ![]() So we learned about lines which extend forever and ever in both directions and we learned about segments which have a definite length and do not go on forever and ever, is it possible to create a figure that contains both of these characteristics? The answer is yes, these hybrids are called rays. In the following number line the segment whose end point is located at a coordinate of -1 and 1 is denoted as segment BD or segment DB likewise a segment that has coordinate at -2 and 2 is denoted as segment AE or segment EA. The horizontal (cross wise or left and right) can be named as segment ST or segment TS. The figure in the right contains two line segments the vertical (up and down) segment can be called segment RS or segment SR or once again we usually denote them in alphabetical order. Also notice that a segment is named in terms of its two ends points, because a segment has a definite beginning and end. The following are examples of line segments the line segment on the left can be denoted as line segment AB or line segment BA notice that we add a segment on top of the letters in order to distinguish it from that of a line which contains arrows in both ends. What distinguishes them from lines is the fact that line segments have a definite beginning and end in other words they are measurable they do not extend forever and ever in both directions like lines do. Like lines, segments are made up of points and are straight. We need to understand number lines in order to understand line segments or simply segments. For example the following line represents a number line and point A is located at -1, likewise point B is located at 1 and half or written another way as 1.5. In algebra you learned that a number line is formed when a numerical value is assigned to each point on a line. To talk about the next geometric figure we need to remember a concept learned in algebra I. The alternative way to name lines is by using their points for example the line in the right contains the points A and B so we can call the line AB using symbols we can denote it like this:ĪB with a line on top or as BA with a line on top both ways are acceptable but for the most part we denote the letters in alphabetical order so AB would be the typical way to denote this line. The first way is by using a single lower case- letter such as line m. The following figures are example of lines there are two different ways we can name lines. Although a picture of a line has some thickness, the line itself has no measurable thickness so keep that in mind unless it is explicitly stated lines have no thickness. ![]() The arrows on the end of the figures show that the lines extend infinitely far in both directions they extend forever and ever. Lines are made up of points and are straight. Another familiar geometric figure is called a line. For example the following five points are called point A, point B, point C, point D, and point E.Īll Geometric figures consist of points. We usually name points by using capital letters. But keep in mind that for the most part they do not have a size we use a dot to visually represent a figure that lacks size. Although a point doesn’t have any size, it is often represented by a dot which does have some size. The simplest figure studied in geometry is called a point. Like any language and mathematics course, the important ideas in geometry must be developed gradually with understanding, practice and effort.Īlright let’s get started with the basics. Geometric principles are important in the construction of buildings and roads, the design and use of machinery, the creation of three dimensional visuals and effects, and to better understand and unlock the secrets of the universe itself. Geometry is extremely useful for Engineers, architects, painters, carpenters, teachers, electricians, machinist homebuilders and many more. ![]()
0 Comments
Leave a Reply.AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |