| Category | Format | Size |
|---|---|---|
| Beijing Normal University Edition Seventh Grade Mathematics Volume 1 | pptx | 6 MB |
"Vertical" Basic Plane Graphics PPT Courseware
Description
"Vertical" Basic Plane Graphics PPT Courseware
vertical definition
Perpendicular: If two straight lines intersect at right angles, then the two straight lines are perpendicular to each other.
Note: Two line segments are perpendicular to each other means that the straight lines where the two line segments are located are perpendicular to each other.
Draw vertical lines by hand
1. Can you use a triangle ruler to draw two mutually perpendicular straight lines?
2. How to determine whether the two straight lines you drew are perpendicular to each other?
3. Can you use a rectangular piece of paper to fold two creases so that they are vertical?
The distance between the vertical line segment and the point and the straight line
Think about it: In the following two figures, can you draw the vertical line l through point A respectively? How many lines can you make in each picture?
Property: In the plane, there is and is only one straight line perpendicular to the known straight line through a point.
Vertical representation
Line AB is perpendicular to line CD, denoted as AB⊥CD at point O
If l and m are used to represent these two straight lines, then the straight line l is perpendicular to m, denoted as l⊥ m at point O
The intersection of two mutually perpendicular straight lines is called the vertical foot (point o in the figure).
Supplementary exercises
1. As shown in the figure, point C on straight line AB leads to two rays CE and CD through point C, and ∠ACE=31° and ∠DCB=59°. What is the positional relationship between CE and CD? Why?
2. As shown in the picture, please use triangles, rulers, pencils, scissors and other tools to cut the quadrilateral cardboard ABCD into a rectangular cardboard.
Keywords: Basic plane graphics courseware, vertical courseware, Beijing Normal University edition seventh grade mathematics volume 1 PPT courseware, seventh grade mathematics slide courseware download, basic plane graphics PPT courseware download, vertical PPT courseware download, .ppt format
For more information about the "Basic Plane Figures Vertical" PPT courseware, please click on the Basic Plane Figures PPT Vertical PPT tab.
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"Perpendicular Bisectors of Line Segments" Proof of Triangle PPT (Lesson 2), 20 pages in total. Part One: Learning Objectives: Be able to prove that the perpendicular bisectors of the three sides of a triangle intersect at one point, and that the distances from this point to the three vertices are equal, and solve related problems. ..
"Perpendicular Bisectors of Line Segments" Proof of Triangle PPT (Lesson 1):
"Perpendicular Bisectors of Line Segments" Proof of Triangle PPT (Lesson 1) Part One Content: Learning objectives will prove the property theorem and judgment theorem of the perpendicular bisector of the line segment; be able to use the property theorem and judgment theorem of the perpendicular bisector of the line segment. Relevant proof...
"Intersection and Perpendicularity" Lines and Angle PPT download:
"Intersection and Perpendicularity" Lines and Angle PPT Download Part One: Classroom Introduction 1. Understand verticality with the help of actual situations and operational activities. 2. Able to use a triangle ruler to draw vertical lines. 3. Be able to solve some simple problems in life based on the principle that the vertical line segment between a point and a line is the shortest.
File Info
Update Time: 2024-06-28
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