"Understanding Geometric Figures from Life" PPT Courseware 4

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"Understanding Geometric Figures from Life" PPT Courseware 4

Think: What is the focus of mathematics on various objects?

It is its shape (such as square, round, etc.), size (such as length, area, volume, etc.) and position (such as intersection, perpendicular, parallel, etc.) while their color, weight, material, etc. are the focus of other disciplines of.

You will see many real objects in your life. Can you imagine the geometric shapes you are familiar with from the following objects?

Some geometric figures do not have all parts in the same plane. These figures are three-dimensional figures.

give it a try

Can you divide the following geometric figures into two categories?

Geometric figures: (points, lines, surfaces, bodies)

Three-dimensional figure: Each part is not in the same plane.

Plane graphics: All parts are in the same plane.

Observing the three moving pictures, what geometric figures can be seen as moving? What geometric figures do their movements form?

Point movement becomes ___, line movement becomes ___, and surface movement becomes ____.

Are there any similar examples like this in life?

Observation and thinking (2):

Regarding this rotation process, please think about the following questions:

1. What shape does the movement of the lower right vertex of the triangle ruler form?

2. What shape is formed by the movement of the lower side of the triangle ruler?

3. What shape is formed by the movement of the surface of the triangle ruler?

Point, line, surface, body

formed by the intersection of lines

Formed by the intersection of faces

the part that surrounds the body

Object graphics (three-dimensional graphics)

The parts represented by the figure are not in the same plane. Such figures are called three-dimensional figures.

The parts represented by the figure are in the same plane. Such a figure is called a plane figure.

practice

As shown in the picture: if the graphics in the second row are rotated around the dotted line, a certain geometric body in the first row can be formed. Connect them with lines.

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"Understanding Geometric Figures from Life" PPT courseware 3:

"Understanding Geometric Figures from Life" PPT courseware 3 The research scope of geometric figures Geometric figures do not consider the color, material and quality of figures, etc. It only focuses on the shape (square, round) and size (length, area, volume) of figures ) and the position (vertical...

"Understanding Geometric Figures from Life" PPT courseware 2:

"Understanding Geometric Figures from Life" PPT Courseware 2 Geometry Research Objects If we only pay attention to their shape, size and position of the objects around us without considering their other properties, we will get various geometric figures. This is the object of geometric study. geometry..

"Understanding Geometric Figures from Life" PPT courseware:

"Understanding Geometric Figures from Life" PPT courseware. Do you know these geometric figures? Please name them. Square (cubic), cuboid, cylinder, cone, sphere. Talk freely. Can you cite some of the above-mentioned shapes in daily life? Geometrically similar objects..

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Update Time: 2024-09-11

This template belongs to Mathematics courseware Hebei Education Edition Seventh Grade Mathematics Volume 1 industry PPT template

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