"Properties of Parallelograms" PPT courseware

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"Properties of Parallelograms" PPT courseware

Part One: Conclusion

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

Representation method Parallelogram ABCD, recorded as "□ABCD", pronounced as "parallelogram ABCD", in which line segments AC and BD are called diagonals.

nature

1. The two opposite sides of a parallelogram are parallel and equal;

2. Opposite angles of a parallelogram are equal.

Properties of parallelograms PPT, part 2: extension

Xiao Ming's family has a parallelogram vegetable field with a well in the middle. For the convenience of watering, Xiao Ming suggested that his mother build a road through the well to divide the vegetable field into two parts of equal area. Students, you know the smart Xiao Ming How did you help your mother divide it?

A weathered old man, after a lifetime of hard work, finally owned a parallelogram of land in his old age. Due to old age and frailty, he decided to divide the land among his four children. Divided like this:

When the four children saw it, they argued endlessly. They all thought that their land was small. Classmates, do you think the old man’s division of land was reasonable? Why?

Properties of parallelograms PPT, Part 3: Classroom exercises

Select: The characteristics that parallelograms have but general quadrilaterals do not have are ()

A. Instability B. Diagonals bisect each other

C. The sum of the interior angles is 360 degrees. D. The sum of the exterior angles is 360 degrees.

If the length of one side of a parallelogram is 5, then the lengths of its two diagonals can be ( )

A. 12 and 2 B. 3 and 4

C. 4 and 6 D. 4 and 8

As shown in the figure, in the plane rectangular coordinate system, the coordinates of the vertex O�B�D of OBCD are as shown in the figure, and the coordinates of the vertex C are ( )

A. (3,7) B. (5,3)

C. (7,3) D. (8,2)

Properties of parallelograms PPT, part 4: summary and reflection

1. What did you gain from studying this lesson?

2. What are the properties of parallelograms?

Sides: Opposite sides are parallel, opposite sides are equal

Angles: Opposite angles are equal and adjacent angles are complementary

Diagonal: Diagonals bisect each other

consolidate new knowledge

The diagonals AC and BD of ABCD intersect at O, and the straight line EF passes through the point O and intersects AB and CD at E and F respectively.

Prove:OE=OF

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"Properties of Parallelograms" Parallelogram PPT Download (Lesson 2):

"Properties of Parallelograms" Parallelogram PPT download (Lesson 2), 18 pages in total. Learning objectives: Master the properties of the diagonals of a parallelogram that bisect each other; use the properties of the diagonals of a parallelogram to solve related problems. ... ... ... Problem thinking Parallel four...

"Properties of Parallelograms" Parallelogram PPT Download (Lesson 1):

"Properties of Parallelograms" Parallelogram PPT download (Lesson 1), 20 pages in total. Learning objectives: Explore the concepts and properties of parallelograms, develop a sense of inquiry and the habit of cooperative communication; be able to use the properties of parallelograms to solve simple problems. ... ... ..

"Properties of Parallelograms" Parallelogram PPT Courseware (Lesson 2):

"Properties of Parallelograms" Parallelogram PPT Courseware (Lesson 2) The first part of the content: The new lesson introduces an old man who has experienced many vicissitudes of life. After a lifetime of hard work, in his later years, he finally owned a piece of parallelogram land. Due to his old age, weak,..

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Update Time: 2024-11-22

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