| Category | Format | Size |
|---|---|---|
| Hebei Education Edition Fourth Grade Mathematics Volume 2 | pptx | 6 MB |
"Ladder" PPT
Description
"Ladder" PPT
Part 1: Definition
A quadrilateral in which one set of opposite sides is parallel and the other set of opposite sides is not parallel is called a trapezoid.
Find the shapes in the objects below.
A quadrilateral with only one set of parallel sides is called a trapezoid.
The two parallel sides are called the upper and lower bases of the trapezoid, and the other two sides are called the waist of the trapezoid.
Draw a vertical line from any point on the upper bottom of the trapezoid to the bottom. The line segment between this point and the vertical foot is called the height of the trapezoid.
Part 2: Let’s talk about it
What is the difference between a trapezoid and a parallelogram?
A trapezoid has only one set of opposite sides that are parallel.
Cut out the trapezoid on the attached page, fold it, and measure it. What did you find?
After folding in half along this dotted line, the two sides completely overlap...
This trapezoid is called an isosceles trapezoid, and an isosceles trapezoid is an axially symmetrical figure.
Part 3: Practice
Which of the following statements is correct ( )
A. The two base angles of an isosceles trapezoid are equal
B. A set of opposite sides of an isosceles trapezoid are equal and parallel
C. Two angles on the same base of an isosceles trapezoid are equal to 90 degrees.
D. There cannot be any right angle among the four interior angles of an isosceles trapezoid.
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For more information about the "Understanding Polygons and Trapezoid" PPT courseware, please click on the "Understanding Polygons ppt Trapezoid ppt" tag.
"Area of Trapezoid" Area of Polygon PPT Courseware:
"Trapezoid Area" PPT Courseware on the Area of Polygons Teaching Objectives 1. Experience the process of group cooperation to explore the trapezoid area formula, communication and application. 2. Explore and master the area formula of a trapezoid, and be able to use the formula to calculate the area of a trapezoid. 3. Get the pleasure of group cooperative learning..
"Area of Trapezoid" Area of Polygon Flash Animation Courseware 4:
"The Area of a Trapezoid" The Area of a Polygon Flash Animation Courseware 4 This courseware is a teaching material for the fifth unit of the fifth grade mathematics volume of the Hebei Education Edition The Area of a Polygon The Area of a Trapezoid Flash Animation Courseware The content is vivid and vivid, please download it! Keywords: Polygonal faces..
"Area of Trapezoid" Area of Polygon Flash Animation Courseware 3:
"The Area of a Trapezoid" The Area of a Polygon Flash Animation Courseware 3 This courseware is a teaching material for the Area of a Polygon in the fifth unit of the fifth grade mathematics volume of the Hebei Education Edition. The Area of a Trapezoid is a Flash animation courseware. The content is vivid and vivid, please download it! Keywords: Polygonal faces..
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Update Time: 2024-07-04
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