"Parallelogram" PPT

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"Parallelogram" PPT

Part One: Analysis of Examples

1. Opposite sides of a rectangle are equal. ( )

2. A quadrilateral with four equal sides must be a square. ( )

3. A square is a special rectangle. ( )

Example 1. Find the parallelogram in the object below.

What characteristics do these objects have in common?

These objects are all deformable...

Parallelograms are unstable.

Example 2. Work in groups to summarize the characteristics of squares, rectangles and parallelograms.

Discuss: What is the relationship between square, rectangle and parallelogram?

Squares and rectangles are special parallelograms.

Parallelogram PPT, part 2 content: Judgment:

1. A quadrilateral is a figure bounded by four line segments. ( )

2. All four sides of a square and a parallelogram are equal. ( )

3. Parallelograms are easily deformed. ( )

4. Triangles are easily deformed. ( )

5. The four corners of a parallelogram are not necessarily right angles. ( )

Parallelogram PPT, Part 3: Why?

The triangle cannot be pulled and is very stable.

The parallelogram is easy to pull and unstable.

What will happen if you nail a strip of wood into a parallelogram?

Move your hands: Cut a parallelogram as follows.

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"Determination of Parallelograms" PPT courseware download:

"Determination of Parallelograms" PPT courseware download Part 1 content: Review Review: Briefly describe the properties of parallelograms: 1. Opposite sides of a parallelogram are equal 2. Diagonals of a parallelogram are equal 3. Diagonals of a parallelogram bisect each other 4. Parallelogram Opposite sides...

"Determination of Parallelograms" PPT download:

"Determination of Parallelograms" PPT Download Part One: Learning Objectives 1. Understand and master the determination theorem of parallelograms 2. Master the application of the determination theorem to explain the determination of parallelograms. 3. Develop reasoning awareness during activities and gradually master the skills of reasoning..

"Determination of Parallelograms" PPT:

"Determination of Parallelograms" PPT Part 1 Content: Properties of parallelograms Sides: Opposite sides are parallel, opposite sides are equal Corollary: Parallel line segments sandwiched between two parallel lines are equal Angles: Opposite angles are equal, adjacent angles are complementary, four angles sum to 360 Diagonals: Bisect each other symmetrically..

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Update Time: 2024-11-20

This template belongs to Mathematics courseware Hebei Education Edition Fourth Grade Mathematics Volume 2 industry PPT template

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