Point Line Plane Space | MathHelp.com - By MathHelp.com
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| 00:0-1 | In our study of geometry , we start out with | |
| 00:03 | the following four ideas . Point line plane and space | |
| 00:12 | . The most basic figure in geometry is called a | |
| 00:15 | point for example , Point A notice that a point | |
| 00:23 | is usually labeled with a capital letter . If we | |
| 00:28 | have two points such as points X . Mhm and | |
| 00:32 | why ? Yeah , we can introduce our next figure | |
| 00:36 | in geometry . Mhm . Which is called a line | |
| 00:43 | Notice that this line passes through our two points X&Y | |
| 00:48 | . So we can call it Line Xy . Which | |
| 00:52 | is represented with a capital X . Y . And | |
| 00:56 | a line over it . Lines can also be represented | |
| 01:00 | using a cursive letter over to the side , such | |
| 01:04 | as an L . So we can also call this | |
| 01:08 | line L . If we have three points such as | |
| 01:14 | points , be see Andy , we can introduce our | |
| 01:22 | next figure in geometry which is called a plane , | |
| 01:26 | think of a plane as a wall or the floor | |
| 01:29 | of a room , a flat surface that has no | |
| 01:33 | thickness . To represent the idea of a plane . | |
| 01:37 | We can use a four sided figure , such as | |
| 01:40 | the one shown here , but it's important to understand | |
| 01:44 | that a plane actually has no edges . It extends | |
| 01:48 | forever in all directions . We can call this figure | |
| 01:54 | playing BCD . Yeah , planes can also be represented | |
| 02:02 | using a single capital letter . So if we use | |
| 02:06 | a P . To label this plane , then we | |
| 02:08 | can call it plain P . If we have 1/4 | |
| 02:15 | point not on plane BCD such as Point G . | |
| 02:20 | Yeah , then we can introduce an idea called space | |
| 02:25 | . Think of Point G as being below playing B | |
| 02:29 | . C . D . In other words Playing BCD | |
| 02:33 | is here and Point G is underneath . Space can | |
| 02:39 | be defined as the set of all points . Uh | |
| 02:43 | huh . |
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