"Surface Area of ​​a Cylinder" Cylinder and Cone PPT Courseware 4

Description

"Surface Area of ​​a Cylinder" Cylinder and Cone PPT Courseware 4

teaching objectives

1. Master the concepts of side area and surface area of ​​a cylinder.

2. Learn how to calculate the side area and surface area of ​​a cylinder, and understand further methods of approximation.

3. Preliminarily understand the application of cylinder surface area and side area in daily life.

Calculate the circumference and area of ​​the circle below.

(1)d=6cm

Circumference: 6×3.14=18.84 (cm)

Area: (6÷2)²×3.14＝28.26 (cm²)

(2) r＝5dm

Circumference: 2×5×3.14=31.4 (cm)

Area: 5²×3.14＝78.5 (cm²)

Think about it, discuss it, measure it, and calculate it:

If you want to calculate the area of ​​the label paper on the beverage can, what do you calculate?

How to calculate the lateral area of ​​this cylinder and what conditions need to be found?

Measure the beverage can in your hand and calculate the area of ​​the label paper.

To find the material area of ​​a biscuit box made of sheet metal, you need to find the total area of ​​the side area of ​​the cylinder and the two base areas.

To find the material area of ​​the paper cup, you need to find the total area of ​​the side area of ​​the cylinder and the base area.

To find the material area of ​​the steel pipe is to find the side area of ​​the cylinder.

Practical exercise: Measure and calculate the material area of ​​a cylindrical (without lid) paper cup.

Group discussions, collaborative measurements and calculations:

(1) To calculate the area of ​​material used to make this cylindrical object, find the areas of which faces? What data do you need to know? How to measure these data?

(2) Data required for measurement (rounded to the nearest centimeter)

(3) Based on the measured data, list the formulas and calculate the results.

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For more information about the "Surface Area of ​​a Cylinder Cylinder and Cone" PPT courseware, please click the "Surface Area of ​​a Cylinder ppt Cylinder and Cone ppt" tag.

"Surface Area of ​​a Cylinder" PPT download:

"Surface Area of ​​a Cylinder" PPT Download Part One: New Lesson Analysis A cylindrical iron bucket without a lid (as shown below). (1) How many square centimeters of iron sheet should be used to make this bucket? 3.143035=3297 (square centimeters) 3.14 (302)2=706.5..

"Surface Area of ​​a Cylinder" PPT courseware:

"Surface Area of ​​a Cylinder" PPT Courseware Part One: Collaborative Exploration There are countless heights of a cylinder, and the lengths of the heights are all equal. Cooperation and communication in a group of four people: ① What shape is there when the side of the cylinder is expanded along the height? ②Which does the length and width of the expanded figure correspond to that of the cylinder?

"Surface Area of ​​a Cylinder" PPT:

"Surface Area of ​​a Cylinder" PPT Part One Content: Teaching Objectives 1. Be able to flexibly use the calculation method of the surface area of ​​a cylinder to solve some simple problems in life according to specific situations, so that students can feel the close connection between mathematics and life. 2. Through imagination and operation Waiting for life...

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Update Time: 2024-10-03

This template belongs to Mathematics courseware Mathematics Volume 2 for Grade 6 of Beijing Normal University industry PPT template

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