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Category | Format | Size |
---|---|---|
Beijing Normal University Ninth Grade First Volume Mathematics | pptx | 6 MB |
Description
"Properties and Judgment of Rhombus" Special Parallelogram PPT Courseware 3
Commonly used determination methods for diamond shapes:
1. A set of parallelograms with equal adjacent sides is a rhombus.
2. A parallelogram whose diagonals are perpendicular to each other is a rhombus.
3. A quadrilateral with four equal sides is a rhombus.
A rhombus is a special parallelogram, so can the area of a rhombus be calculated using the parallelogram area formula?
S rhombus = BC. AE
Area: S rhombus = base × height = half the product of diagonals
Apply what you learn
1. It is known that the circumference of the rhombus is 12cm, then its side length is ______.
2. In rhombus ABCD, ∠ABC=60 degrees, then ∠BAC=_______.
3. The lengths of the two diagonals of the rhombus are 6cm and 8cm respectively, then the area of the rhombus is _____.
Rhombus problems can be solved by transforming them into right triangle or isosceles triangle problems
Determination method 1: A set of parallelograms with equal adjacent sides is a rhombus
∵ Quadrilateral ABCD is a parallelogram
AB=BC
∴Quadrilateral ABCD is a rhombus
Decision Theorem 2 A parallelogram with mutually perpendicular diagonals is a rhombus
Decision Theorem 3: A quadrilateral with all four sides equal is a rhombus
Keywords: Special parallelogram teaching courseware, Rhombus properties and determination teaching courseware, Beijing Normal University edition ninth grade mathematics volume PPT courseware, Ninth grade mathematics slide courseware download, Special parallelogram PPT courseware download, Rhombus properties and determination PPT courseware Download, .ppt format
For more information about the PPT courseware "Special Parallelograms and Rhombuses' Properties and Determinations", please click on the Special Parallelograms ppt Properties and Determinations of Rhombuses ppt tag.
"Properties and Judgment of Rhomboids" Special Parallelogram PPT Courseware 6:
"Properties and Judgment of Rhomboids" Special Parallelogram PPT Courseware 6 1. Knowledge Review 1. As shown in the figure: In rhombus ABCD, AB=6, (1) What are the lengths of the three sides AD, DC, and BC? (2) What is the positional relationship between diagonals AC and BD? (3)If ADC=12..
"Properties and Judgment of Rhombus" Special Parallelogram PPT Courseware 5:
"Properties and Determination of Rhombuses" Special Parallelogram PPT Courseware 5 Review the past and learn new things 1. What is the definition of a rhombus? 2. As shown in the figure, it is known that the quadrilateral ABCD is a parallelogram, then you only need to add ______ to determine that it is a rhombus. 3. If The diagonal AC of rhombus ABCD is given...
"Properties and Judgment of Rhomboids" Special Parallelogram PPT Courseware 4:
"Properties and Judgment of Rhombus" Special Parallelogram PPT Courseware 4 Think about it: A rhombus is a special parallelogram, which has all the properties of a general parallelogram. Can you list some such properties? Opposite sides of a rhombus are parallel and equal, opposite angles are equal, and opposite angles...
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Update Time: 2024-10-08
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