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Course Introduction:"Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.
Course Advanced 10582
Course Introduction:"Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.
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Course Introduction:AutoCAD2020 is a highly professional drawing software, but many users are confused about how to distinguish coordinates and relative coordinates. In this article, we will explain the difference between the two with examples, let’s take a look! As shown in the figure below, we take point O, point A, point B and related graphics as examples to explain the concepts of coordinates and polar coordinates in AutoCAD. In the figure, point O is the coordinate origin in AutoCAD, the X-axis is horizontally to the right, and the Y-axis is vertically upward. The coordinate of the coordinate origin is (0.0). We can enter the coordinates of a point based on this coordinate to determine the location of the point. Suppose we draw a straight line with the starting point coordinates (500, 400). The drawing method is: click the straight line command-enter the coordinates
2024-03-13 comment 0 1064
Course Introduction:1. Method of establishing a Cartesian coordinate system: Directly open the system default coordinate system and use [Define Coordinate System] in the [Draw] menu to directly generate a Cartesian coordinate system. After opening the drawing tablet, click [Draw], and in the pop-up menu, click [Define Coordinate System]. This is the simplest method to establish a rectangular coordinate system. Method 2: Use the coordinate system tool under Custom Tools. In the geometry sketchpad, press and hold the custom tool button on the left with the mouse. The shortcut tool options will pop up, including several coordinate system customization tools, such as New Coordinate System. , mini coordinate system, and classic coordinate system. You can also use these tools to quickly establish a plane rectangular coordinate system. Method 3: Construct a plane rectangular coordinate system of any unit length. If you are not satisfied with the unit length of the system's default coordinate system, we can also
2024-04-17 comment 0 438
Course Introduction:Operation method one: Open the system default coordinate system directly. After opening the geometric sketchpad, click [Draw], and in the pop-up menu, click [Define Coordinate System]. This is the simplest method. Operation method two: Construct a rectangular coordinate system with any unit length. Taking the unit length as 2.5 cm as an example: 1. Use the translation command to construct point B. Use the point tool to draw a point A, select it and click [Transform] - [Translate]. After entering 2.5 in the [Fixed Distance] column in the translation window, click [Translation] in the lower right corner of the dialog box to get another point B. 2. Construct the line segment and define the unit length. Select point A and point B, click [Line Segment] under the [Construction] menu, and create a 2.5 cm long line segment AB. Select [Define unit length] under the [Drawing] menu to create a
2024-04-17 comment 0 1058
Course Introduction:Vertical coordinate system. Open the geometric sketchpad, click the [Draw] menu at the top, and select the [Create Coordinate System] command from the drop-down menu, so that you can establish a plane rectangular coordinate system in the sketchpad. Run the draw point command. Click the [Draw] menu above and select the [Draw Points] command from its drop-down menu, so that a dialog box for drawing points will pop up. A point with known coordinates. In the pop-up drawing point dialog box, enter the abscissa and ordinate in sequence, and then click the [Draw] button to draw the point in the coordinate system.
2024-06-02 comment 0 853
Course Introduction:Taking the construction of the bisector of the first quadrant as an example, the specific operations are as follows: Establish a rectangular coordinate system. Open the geometric sketchpad and execute the [Draw] - [Define Coordinate System] command to establish a plane rectangular coordinate system. Draw the point (1,1) in the coordinate system. Execute the menu [Draw] - [Draw Point] command, enter the coordinates (1, 1) in the pop-up dialog box, click the [Draw] button, and then click the [Finish] button to get the coordinate point as shown in the figure. . Execute the construction ray command. Select the origin and the point drawn in the previous step, and then execute the menu [Construction] - [Ray] command, as shown in the figure. This gives the bisector of the first quadrant, as shown in the figure.
2024-06-01 comment 0 479