"Determination of Parallelograms" PPT courseware download

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"Determination of Parallelograms" PPT courseware download

Part One Content: Review Review:

Briefly describe the properties of parallelograms:

1. Opposite sides of a parallelogram are equal

2. The opposite angles of a parallelogram are equal

3. The diagonals of a parallelogram bisect each other

4. Opposite sides of a parallelogram are parallel and equal to each other

5. A parallelogram is a centrally symmetrical figure, and the center of symmetry is the intersection of the diagonals.

6. Parallel line segments sandwiched between two parallel lines are equal.

7.The distance between parallel lines is equal everywhere.

Judgment of parallelograms PPT, part 2: Judgment of parallelograms

1. A quadrilateral with two sets of opposite sides that are parallel is a parallelogram.

2. A quadrilateral with two sets of opposite sides equal to each other is a parallelogram.

3. A set of quadrilaterals whose opposite sides are parallel and equal is a parallelogram.

question

Is the converse statement that the opposite angles of a parallelogram are equal true?

It is known that: in the quadrilateral ABCD, ∠A=∠C, ∠B=∠D;

Prove: Quadrilateral ABCD is a parallelogram

Judgment of parallelograms PPT, part three: analysis of examples

Example 6. Known: In the parallelogram ABCD as shown in the figure, E and F are two points on the diagonal AC, and AE=CF.

Prove: Quadrilateral BFDE is a parallelogram

Example 7. Known: In the parallelogram ABCD as shown in the figure, AE and CF are the bisectors of , respectively, and the sides BC and AD intersect at points E and F respectively.

Prove: Quadrilateral AECF is a parallelogram

Judgment of parallelograms PPT, Part 4: Judgment of right and wrong

(1) A quadrilateral in which one set of opposite sides is parallel and the other set of opposite sides are equal is a parallelogram; ( )

(2) A quadrilateral with two sets of equal opposite angles is a parallelogram ( )

(3) A set of quadrilaterals whose opposite sides are parallel and whose opposite angles are equal are parallel polygons; ( )

(4) A set of parallelograms with opposite sides and complementary adjacent angles is a parallelogram; ( )

(5) A quadrilateral with two sets of complementary adjacent angles is a parallelogram. ( )

Keywords: Free download of Hebei Education Edition mathematics PPT courseware for eighth grade volume 2, PPT download on the determination of parallelograms, .PPT format;

For more information about the "Determination of Parallelograms" PPT courseware, please click on the "Determination of Parallelograms" ppt tab.

"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..

"Determination of Parallelograms" PPT courseware 3:

"Determination of Parallelograms" PPT Courseware 3 Review What are the properties and determinations of parallelograms that we have learned before? Properties Opposite sides of a parallelogram are equal. Opposite angles of a parallelogram are equal. The diagonals of a parallelogram bisect each other. Determination: Two sets of opposite sides are parallel..

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Update Time: 2024-07-09

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

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