"Measuring the Height of the Flagpole" Similar Graphics PPT Courseware 2

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"Measuring the Height of the Flagpole" Similar Graphics PPT Courseware 2

Expand your thinking

Students, how do you use the knowledge about similar triangles to measure the height of a flagpole (or street lamp, tree, or chimney)?

Key points of method

Application method 1: Sunlight can be approximately regarded as parallel rays, and the height of the observer is also used in the calculation.

Application method 2: The observer's eyes must be "three points collinear" with the top of the pole and the top of the flagpole. The pole must be perpendicular to the ground. The height of the observer's eyes from the ground must also be used in the calculation.

Usage method 3: The incident angle of light is equal to the reflection angle.

train myself

Task: The whole class will form a group of five people, select a group leader, and go outdoors to select the measurement objects for actual measurement. The objects to be measured may not necessarily be flagpoles, such as buildings, trees, telephone poles, etc.

Requirements: Complete it outside class and write a practical report.

Endless aftertaste

What did you gain from this class (knowledge and operation)?

In the process of applying scientific knowledge to practice, what abilities have you acquired? Have you thought of the best method?

Are you satisfied with your performance in cooperating and communicating with peers?

Which of your peers do you think are the most worthy of learning?

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For more information about the PPT courseware "Measure the Height of the Flagpole with Similar Figures", please click on the Measuring the Height of the Flagpole ppt with Similar Figures ppt tag.

"Measuring the Height of the Flagpole" Similar Graphics PPT Courseware 3:

"Measuring the Height of the Flagpole" Similar Figures PPT Courseware 3 Learning Objectives 1. By measuring the height of the flagpole, students can comprehensively use the similar judgment conditions and properties of triangles to solve problems, develop students' awareness of mathematical applications, and deepen students' understanding of similar triangles. 2...

"Measuring the height of the flagpole" similar graphics PPT courseware:

"Measuring the Height of the Flagpole" Similar Figures PPT Courseware Activity 1 Read textbook page P141 and complete the following questions: 1. Are the two triangles in Figure 4-20 similar? Why? 2. Use the shadow in the sun to measure the height of the flagpole. What needs to be measured? Do you need data to calculate height? ..

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Update Time: 2024-09-03

This template belongs to Mathematics courseware Beijing Normal University eighth grade mathematics volume 2 industry PPT template

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