| Category | Format | Size |
|---|---|---|
| Hebei Education Edition Fourth Grade Mathematics Volume 1 | pptx | 6 MB |
"Understanding Perpendicular Lines" PPT Courseware of Perpendicular Lines and Parallel Lines
Description
"Understanding Perpendicular Lines" PPT Courseware of Perpendicular Lines and Parallel Lines
teaching objectives
1. Combined with specific examples, go through the process of understanding the intersection (including vertical) relationship between two straight lines.
2. Know that two straight lines on a plane intersect to form four angles, and there is an intersection point; understand the meaning of two straight lines that are perpendicular to each other, and understand the vertical line and the distance from a point to a straight line.
3. Actively participate in mathematics activities and gain a positive learning experience.
Explore new knowledge
How many angles do two straight lines intersect at? How many intersection points are there?
Two straight lines intersect to form 4 angles, with only 1 point of intersection.
When two straight lines intersect at right angles, they are said to be perpendicular to each other. One of the straight lines is called the perpendicular to the other straight line.
The figure below shows four line segments drawn from point A outside the straight line to the straight line.
Let’s talk about which of the four line segments from point A to the straight line is a perpendicular line?
Which of the four line segments is the shortest?
The length of the vertical segment drawn from a point outside the straight line to the straight line is called the distance of the inverted straight line from that point.
practice
1. Point out the mutually perpendicular lines in the figure below.
2. In the picture below, if Xiao Ming crosses the road from point A, what is the shortest route? Why? Draw the shortest route.
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For more information about the "Perpendicular and Parallel Lines and Understanding Perpendicular Lines" PPT courseware, please click on the "Perpendicular and Parallel Lines ppt and Understanding Perpendicular Lines" ppt tag.
File Info
Update Time: 2024-07-03
This template belongs to Mathematics courseware Hebei Education Edition Fourth Grade Mathematics Volume 1 industry PPT template
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