"Intersecting Line" PPT

Description

"Intersecting Line" PPT

Part One: Introduction to Situation

In order to measure the intersection angle of the side walls of the paper cup, the clever Xiao Hong designed the following plan. Can you explain the principle?

learning target

1. Understand the concept of vertical angles and master the properties of vertical angles.

2. Be able to identify concentric angles, interior angles, and congruent interior angles.

Intersecting lines PPT, part 2: learning and discovery

Lines CD and EF intersect to form four angles. What are the relationships between any two angles?

The relationship between two angles is called supplementary angles

What is the relationship between two angle vertices that are complementary angles?

What is the relationship between the two sides?

Common vertices, one side coincides with each other, and the other side is a reverse extension of each other.

Intersecting lines PPT, part three: consolidation and application

Ask students to draw the opposite angles of ∠ABC on their study plans and complete Research 1.

∠DBE and ∠ABC are opposite vertex angles

Cooperation and exchange

Properties of opposite vertex angles: opposite vertex angles are equal.

It is known that ∠1 and ∠3 are opposite vertex angles, then ∠1=∠3.

reason:

Because ∠1 and ∠2 are complementary, and ∠2 and ∠3 are complementary.

Then ∠1=∠3 (supplementary angles of the same angle are equal)

Intersecting lines PPT, part 4 content: homework

1. Must-do questions: Exercises on textbook P37.

2. Optional question: As shown in the figure, straight lines AB and CD intersect EF at points G and H, ∠2=∠3, ∠1=70°, find the degree of ∠4.

Keywords: Free download of Hebei Education Edition mathematics PPT courseware for seventh grade volume 2, intersecting lines PPT download, .PPT format;

For more information about the "Intersecting Lines" PPT courseware, please click on the "Intersecting Lines" ppt tab.

"Intersecting Lines" PPT courseware:

"Intersecting Lines" PPT Courseware Part One: Observation and Thinking As shown in the figure: Line AB and line CD intersect at point O (1) What are the positional characteristics of 1 and 3 in the picture? (2) What are the connections and differences between 1 and 3 on the edges and vertices in the figure? Opposite vertices: 1 and 3 have a common vertex as..

"Supplementary Angle and Supplementary Angle" Parallel Lines and Intersecting Lines PPT Courseware 4:

"Complementary and Supplementary Angles" Parallel Lines and Intersecting Lines PPT Courseware 4 Complementary Angles Generally speaking, if the sum of two angles is equal to 90 (right angle), the two angles are said to be complementary angles to each other. That is, each angle is the supplementary angle of another angle. Please judge: (1)1+2=90, then 1 is the supplementary angle...

"Supplementary Angle and Supplementary Angle" Parallel Lines and Intersecting Lines PPT Courseware 3:

"Supplementary Angle and Supplementary Angle" Parallel Lines and Intersecting Lines PPT Courseware 3 Entering Life 1. What are the three interior angles of the triangle you usually use? What is the sum of two of the acute angles? 2. The picture shows a broken right-angled triangle. Can you find the broken corner?

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Update Time: 2024-09-03

This template belongs to Mathematics courseware Hebei Education Edition Seventh Grade Mathematics Volume 2 industry PPT template

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