"Properties and Judgment of Rectangles" Special Parallelogram PPT Courseware 3

Description

"Properties and Judgment of Rectangles" Special Parallelogram PPT Courseware 3

Explore new knowledge:

A rectangle is a special parallelogram. In addition to having all the properties of a parallelogram, what other special properties does it have?

Conjecture 1: The four corners of the rectangle are all right angles.

Conjecture 2: The diagonals of the rectangle are equal.

Theorem: The four corners of a rectangle are right angles.

Theorem: The diagonals of a rectangle are equal.

Apply what you learn

1. The property that a rectangle has but that a general parallelogram does not have is ( ).

A. Diagonals are equal B. Opposite sides are equal

C. Diagonals are equal D. Diagonals bisect each other

2. The lengths of a set of adjacent sides of a rectangle are 3cm and 4cm respectively, then its diagonal length is ______cm.

Leisure stop

1. Definition of rectangle: A parallelogram with one right angle is called a rectangle

2. Rectangle Opposite sides of a rectangle are parallel and equal

The four corners of a rectangle are right angles

The diagonals of a rectangle bisect each other and are equal

3. An important property of a right triangle: the midline on the hypotenuse is equal to half of the hypotenuse;

4. When performing relevant calculations or proofs in a rectangle, the problem is often transformed into a right triangle or an isosceles triangle according to the properties of the rectangle, and the relevant properties of the right triangle or isosceles triangle are used to solve the problem.

Definition of rectangle:

A parallelogram with one right angle is called a rectangle

Opposite sides of a rectangle are parallel and equal;

The four corners of a rectangle are right angles;

The diagonals of a rectangle are equal and bisect;

Properties of the midline on the hypotenuse of a right triangle

The midline of the hypotenuse of a right triangle is equal to half of the hypotenuse.

Keywords: Special parallelogram teaching courseware, Properties and determination of rectangles teaching courseware, Beijing Normal University edition ninth grade mathematics volume 1 PPT courseware, Ninth grade mathematics slide courseware download, Special parallelogram PPT courseware download, Properties and determination of rectangle PPT courseware Download, .ppt format

For more information about the "Properties and Determination of Special Parallelogram Rectangles" PPT courseware, please click on the "Properties and Determination of Special Parallelograms ppt Rectangles" ppt tag.

"Properties and Judgment of Rectangles" Special Parallelogram PPT Courseware 8:

"Properties and Judgment of Rectangles" Special Parallelogram PPT Courseware 8 Review Import 1. As shown in Figure 1, the two diagonals of the rectangle ABCD intersect at point O. It is known that AOD= 120, AB=2.5cm, then DAO=_____, AC=_____cm, S rectangle ABCD=_____. 2. As shown in Figure 2,...

"Properties and Judgment of Rectangles" Special Parallelogram PPT Courseware 7:

"Properties and Judgment of Rectangles" Special Parallelogram PPT Courseware 7 Scenario 1: On a parallelogram movable frame, two rubber bands are used to cover two opposite vertices respectively. When pulling a pair of non-adjacent vertices , what happens to the shape of a parallelogram...

"Properties and Judgment of Rectangles" Special Parallelogram PPT Courseware 6:

"Properties and Judgment of Rectangles" Special Parallelogram PPT Courseware 6 The first link: Create a scenario and introduce a new lesson Question 1: What are the properties of parallelograms? Question 2: Use an active parallelogram teaching aid to demonstrate how to change an interior angle of a parallelogram...

File Info

Update Time: 2024-09-26

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

Preview