"Organization and Review" PPT courseware on the area of ​​polygons

Description

"Organization and Review" PPT courseware on the area of ​​polygons

teaching objectives

1. Go through the process of systematically reviewing the knowledge in this unit and consolidating it with formula calculations.

2. Further master the calculation methods of the area of ​​parallelograms, triangles, trapezoids and combined figures, and improve the accuracy of calculations.

3. Master the basic ideas and methods of deriving area formulas and enhance your confidence in learning mathematics well.

Consolidate review

1. Write down the formulas for calculating the area of ​​the graph below, and talk about how these formulas are derived.

2. First measure the data needed to calculate the area of ​​each figure, and then calculate their areas separately. Compare their areas and what do you find?

3. Is the following statement correct? If not, please give an example.

(1) The area of ​​a triangle is half of the area of ​​a parallelogram.

(2) As long as their perimeters are equal, the areas of a rectangle and a parallelogram must be equal.

(3) If the heights of two triangles are equal, their areas are equal.

(4) Two triangles with equal bases and equal heights must have equal areas regardless of their shapes.

practice

1. Calculate the area of ​​the figure below. (Unit: cm)

(5+6.8)×3.2÷2=18.88 (cm²)

9.4×3.5÷2＝16.45（cm²）

8.2×4.6＝37.72（cm²）

2. Select appropriate data and find the area of ​​the graph. (Unit: cm)

3. There is a square pool in the middle of a trapezoidal land, and the rest is green space (as shown in the picture below). What is the area of ​​green space in square meters?

20×20＝400（m²）

(40＋80)×40÷2＝2400 (m²)

2400－400＝2000（m²）

Answer: The area of ​​green space is 2,000 square meters.

Keywords: Area of ​​Polygon teaching courseware, organizing and reviewing teaching courseware, Hebei Education Edition fifth grade mathematics volume PPT courseware download, fifth grade mathematics slide courseware download, area of ​​polygon PPT courseware download, organizing and reviewing PPT courseware download, .PPT Format;

For more information about the "Organizing and Reviewing the Area of ​​Polygons" PPT courseware, please click the "Organizing and Reviewing the Area of ​​Polygons ppt ppt" tab.

"Organization and Review" Percentage PPT Courseware:

"Organization and Review" Percentage PPT Courseware Teaching Objectives 1. Experience the process of systematic review and organization of the knowledge learned in this unit, and the consolidation and improvement of basic skills. 2. Further understand percentages, master the mutual conversion of percentages and fractions (decimals) and the method of calculating percentages..

"Organization and Review" Equation PPT Courseware:

"Organization and Review" Equations PPT Courseware Teaching Objectives 1. Experience the process of systematically reviewing, consolidating and improving the knowledge of equations and solving equations. 2. Further master the method of solving equations using the properties of equations, and be able to use equations to correctly answer practical problems. 3. Solve the equation in the series..

"Organization and Review" Decimal Multiplication PPT Courseware:

"Organization and Review" Decimal Multiplication PPT Courseware Teaching Objectives 1. Experience the process of understanding travel plan information, calculating costs, and discussing travel plans. 2. Be able to comprehensively apply the knowledge learned to solve practical problems in tourism and improve the practical ability to solve problems. 3. Feeling..

File Info

Update Time: 2024-11-17

This template belongs to Mathematics courseware Hebei Education Edition Fifth Grade Mathematics Volume 1 industry PPT template

Preview