Western Normal University Edition First Grade Mathematics Volume 1
Beijing Normal University Edition Seventh Grade Mathematics Volume 1
People's Education Press First Grade Mathematics Volume 1
People's Education Press Second Grade Mathematics Volume 1
People's Education Press Third Grade Mathematics Volume 1
Beijing Normal University Edition Seventh Grade Mathematics Volume 2
Qingdao Edition Seventh Grade Mathematics Volume 1
Hebei Education Edition Third Grade Mathematics Volume 1
Beijing Normal University Edition Fifth Grade Mathematics Volume 1
Beijing Normal University Edition Eighth Grade Mathematics Volume 1
People's Education High School Mathematics Edition B Compulsory Course 2
Hebei Education Edition Seventh Grade Mathematics Volume 2
Hebei Education Edition Fourth Grade Mathematics Volume 2
Beijing Normal University Edition Fifth Grade Mathematics Volume 2
People's Education Press First Grade Mathematics Volume 2
Qingdao Edition Seventh Grade Mathematics Volume 2
Category | Format | Size |
---|---|---|
Hebei Education Edition Eighth Grade Mathematics Volume 2 | pptx | 6 MB |
Description
"Rectangle" PPT courseware
Part One: Introduction of New Course
1. Rectangle: A parallelogram with a right angle is called a rectangle.
2. Properties of rectangle:
Properties of Rectangle Theorem 1: The four corners of a rectangle are right angles.
Properties of Rectangle Theorem 2: The two diagonals of a rectangle are equal.
Corollary of the property theorem: The midline of the hypotenuse of a right triangle is equal to half the length of the hypotenuse.
Rectangular PPT, part 2: practice
1. The length of the short side of the rectangle is 3cm, and the obtuse angle formed by the two diagonals is 120°, then its diagonal length is _______.
2. It is known that the diagonal length of the rectangle is 4cm and the length of one side is ______cm,
Then the area of the rectangle is ________.
3. True or False Questions
(1). A rectangle is a parallelogram ( )
(2). The two diagonals of the rectangle divide the rectangle into four isosceles triangles with equal areas ( )
Rectangular PPT, the third part: theorem verification
Determination theorem of rectangle: A quadrilateral with three right angles is a rectangle
Known: In quadrilateral ABCD, ∠A=∠B=∠C=90°
Prove: Quadrilateral ABCD is a rectangle.
Prove: ∵∠A=∠B=90°
∴∠A+∠B=180°
∴AD∥BC
Similarly: AB∥CD
∴ Quadrilateral ABCD is a parallelogram
∵∠A=90°
∴ Quadrilateral ABCD is a rectangle
Rectangular PPT, Part 4: Practice
1. Among the following conditions, which one cannot determine that quadrilateral ABCD is a rectangle ( ).
A. AB∥CD, AB=CD, AC=BD
B. ∠A=∠B=∠D=90°
C. AB=BC, AD=CD, and ∠C=90°
D. AB=CD, AD=BC, ∠A=90°
2. The quadrilateral that can be enclosed by the bisectors of the interior angles of a parallelogram is ( )
A.Trapezoid
B. Rectangle
C. Square
D. Not a parallelogram
3. Which of the following statements is wrong ( )
A. A parallelogram with one right angle is a rectangle.
B. The four corners of a rectangle are all right angles, and the diagonals are equal
C. A parallelogram with equal diagonals is a rectangle
D. A quadrilateral with two right angles is a rectangle
Keywords: Free download of Hebei Education Edition mathematics PPT courseware for eighth grade volume 2, rectangular PPT download, .PPT format;
For more information about the "Rectangle" PPT courseware, please click the Rectangle PPT tab.
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File Info
Update Time: 2024-10-19
This template belongs to Mathematics courseware Hebei Education Edition Eighth Grade Mathematics Volume 2 industry PPT template
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