"View" Projection and View PPT (Lesson 2)

Description

"View" Projection and View PPT (Lesson 2), 18 pages in total.

learning target

1. Be able to identify three-dimensional views of complex geometries. (Key points)

2. Able to draw three-dimensional views of complex geometries, and judge physical prototypes based on complex three-dimensional views. Key points)

3. Clarify the difference between solid lines and dotted lines in the three-dimensional view. (Difficulty)

Teach a new lesson

Draw three views of complex geometry

Example 1: Draw the front view, left view, and figure view of the four-sided prism in the figure below.

Solution: When drawing a view, the outline of the visible part should be drawn as a solid line, and the outline of the invisible part should be drawn as a dotted line.

Example 2: The picture below is a top view of an isosceles trapezoidal prism with a base. Try to draw their front and left views.

Determine geometry based on views

Example 3: Please draw geometric figures based on the three views provided below.

Method induction

When guessing the shape of a geometric object based on three views, proceed step by step. First guess what geometric objects it may be based on a relatively simple view. Then guess what geometric objects it may be based on the other two views. Their common part is the problem. Answer.

Practice in class

1. The front view and left view of a geometry are as shown in the figure. Please draw a top view of this geometry.

2. The front view and top view of a right prism are as shown in the figure. Describe the shape of the right prism and draw its left view.

3. The following are three views of an object. Please describe its shape.

4. The picture below is a top view of the geometry built by several small squares. The number in the small square indicates the number of small cubes at that position. Please draw the front view and left view of its geometry.

Class summary

Determine views of complex geometries

Visible contours are drawn as solid lines, invisible contours are drawn as dotted lines.

Determine geometry based on views

Keywords: Beijing Normal University Edition Ninth Grade Volume 1 Mathematics PPT courseware free download, view PPT download, projection and view PPT download, .PPT format;

For more information about the "Projection and View" PPT courseware, please click the Projection and View PPT View PPT tab.

"View" Projection and View PPT Download (Lesson 2):

"View" Projection and View PPT Download (Lesson 2), 15 pages in total. Basics of knowledge points Knowledge point 1 Identify the three views of a prism 1. Jiajia gave her father a gift box on Father's Day this year. The front view of the gift box is (C) 2. As shown in the figure, the top view of the geometry is (A)..

"View" Projection and View PPT Download (Lesson 1):

"View" Projection and View PPT Download (Lesson 1), 13 pages in total. Basic knowledge points Knowledge points Three views of cylinder, cone and sphere 1. (Changchun High School Entrance Examination) Among the following three-dimensional figures, the main view is a circle (D) 2. (Kunming High School Entrance Examination) The left view of the following geometric bodies..

"View" Projection and View PPT Courseware (Lesson 2):

"View" Projection and View PPT Courseware (Lesson 2) Learning Objectives: Recognize geometry from three views. Calculation of geometry represented by three views... ... Understand new knowledge points. Recognize geometry from three views and imagine it from three views. Geometry: (1) Method: by..

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Update Time: 2024-11-21

This template belongs to Mathematics courseware Beijing Normal University Edition Ninth Grade Mathematics Volume 1 industry PPT template

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