| Category | Format | Size |
|---|---|---|
| Hebei Education Edition Fifth Grade Mathematics Volume 1 | pptx | 6 MB |
"Area of Parallelogram" Area of Polygon PPT Courseware 3
Description
"Area of Parallelogram" Area of Polygon PPT Courseware 3
teaching objectives
1. Experience the process of exploring the formula for the area of a parallelogram through hands-on operations, discussion, and induction.
2. Explore and master the area formula of parallelograms, and be able to use the formula to calculate the area of parallelograms.
3. In the process of exploring the area formula of a parallelogram, feel the mathematical thought of transformation; feel the orderliness of the derivation process of the area formula and the certainty of the mathematical conclusion.
Review and consolidate
What geometric shapes have you learned?
Area of rectangle = length × width
Area of a square = side length × side length
Explore new knowledge
If S represents the area of the parallelogram, a represents the base of the parallelogram, and h represents the height of the parallelogram, then the formula for calculating the area of the parallelogram is:
Area of parallelogram = base × height
S = a × h
S = a·h
S=ah
practice
1. There is a parallelogram steel plate (as shown below). What is its area in square meters? (Keep the result as an integer)
4.8×3.4
=16.8
≈17 (square meters)
Answer: Its area is 17 square meters.
2. Make a movable parallelogram wooden frame yourself.
(1) Measure its base and height and find its area.
(2) Pull it, observe whether the base and height of the parallelogram have changed, measure and calculate its area.
3. It is known that the area of a parallelogram is 56 square meters and the base is 8 meters. How many meters high is it?
56÷8＝7 (meters)
Answer: Its height is 7 meters.
4. There is a parallelogram vegetable plot with a base of 30 meters and a height of 15 meters. If 5 kilograms of spinach are harvested per square meter of vegetable land, how many kilograms of spinach can be harvested from this land?
30×15×5
=450×5
=2250 (kg)
Answer: This land can harvest 2,250 kilograms of spinach.
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For more information about the "Area of Polygons and Area of Parallelograms" PPT courseware, please click on the "Area of Polygons ppt Area of Parallelograms ppt" tag.
"Area of Parallelogram" Area of Polygon PPT Courseware 2:
"Area of Parallelogram" Area of Polygon PPT Courseware 2 The picture below is a parallelogram. Each square in the figure represents 1 square centimeter. Please use the method of counting squares to find out its area. (If it is less than one square, it will be calculated as half a square.) Observe the following two...
"Area of Parallelogram" Area of Polygon PPT Courseware:
"Area of Parallelograms" Area of Polygon PPT courseware Tell me what are the base and height of the parallelogram below? Can you find the area of the parallelogram by counting grids? Guess: The base and height of this parallelogram are related to its area What is the relationship between them? ..
"Calculation of the Area of a Parallelogram" Area of a Polygon PPT Courseware:
"Calculation of the Area of a Parallelogram" PPT Courseware on the Area of Polygons Count: The area of a parallelogram ( ) square centimeters The area of a rectangle is ( ) square centimeters Example question What is the area of a parallelogram steel plate (as shown below)? (Keep the number...
File Info
Update Time: 2024-07-03
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