"Supplementary Angle and Supplementary Angle" Preliminary Understanding of Graphics PPT Courseware

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"Supplementary Angle and Supplementary Angle" Preliminary Understanding of Graphics PPT Courseware

Part One: Introduction of New Course

Question (1) Use a protractor to measure the degrees of the two angles in the figure, and find the sum of the two angles.

(2) Name the degrees of each angle in a set of triangles.

(3) Observe the quantitative characteristics between the sizes of the two acute angles.

Supplementary angles and supplementary angles PPT, part 2: advancing the new lesson

Exploration 1 (1) In a set of triangles, each piece has an angle of 90°, so what is the sum of the other two angles?

(2) It is known that ∠1=36° and ∠2=54°, then ∠1+∠2= ( ).

If the sum of two angles is equal to 90° (right angle), the two angles are said to be supplementary to each other, that is, one angle is the supplement of the other angle.

For example: ∠1 and ∠2 are supplementary angles to each other, ∠1 is a supplementary angle of ∠2, and ∠2 is also a supplementary angle of ∠1.

Exploration 2 (1) Observe the two angles as shown in the figure. Can you guess how many degrees ∠1+∠2 equals?

(2) If ∠1=144° and ∠2=36°, then ∠1+∠2=?

[Summary conclusion] If the sum of two angles is equal to 180° (straight angle), the two angles are said to be supplementary angles, that is, one of the angles is the supplement of the other angle.

Exploration 3 As shown in the figure, what is the relationship between ∠1 and ∠3 in the grid diagram below? What is the relationship between ∠1 and ∠2, and ∠3 and ∠4?

∠1=∠3, ∠1+∠2=180°, ∠3+∠4=180°

【Summary conclusion】

1. The supplementary angles of identical angles (congruent angles) are equal.

2. The supplementary angles of identical angles (congruent angles) are equal.

Give it a try 1. If ∠AOB+∠BOC=90°, and ∠BOC and ∠COD are mutually supplementary, then the relationship between ∠AOB and ∠COD is ( )

A Reciprocal B Complementary C Equal D Uncertain

Supplementary angles and supplementary angles PPT, part 3: practice in class

1. The supplementary angle of a 66° angle is ________.

2. As shown in the figure, if ∠1+∠2=180°, , ∠3+∠2=180°, then ∠1=________, based on ______________.

3. According to the rules of up, north, down, south, left, west, right and east, draw the cross lines representing southeast, northwest, and then indicate the rays in the following directions on the diagram:

(1) 30° west by north; (2) 60° east by south;

(3) North by east 15°; (4) Southwest (south by west 45°)

4. As shown in the figure, a car is driving from west to east on the road, ∠AOB=30°, ∠DO'C=150°. If the car turns right, how many degrees does it need to turn? If the car turns left, how many degrees does it need to turn?

Solution: The right corner is 180°-∠DO'C

=180°-150°=30°.

The left corner is 180°-∠AOB

=180°-30°=150°.

Supplementary angles and supplementary angles PPT, Part 4 content: Class summary

What did you gain from this class? If you think there are any questions, you may wish to discuss them with your colleagues.

after class homework

1. Select exercises from the textbook,

2. Complete the exercises in this lesson in the exercise book.

Keywords: free download of PPT courseware for mathematics in the first volume of the seventh grade of the People's Education Press, PPT download of supplementary angles and supplementary angles, PPT download of preliminary understanding of graphics, .PPT format;

For more information about the PPT courseware "Preliminary Understanding of Supplementary Angle and Supplementary Angle Figures", please click on the "Preliminary Understanding of Supplementary Angle and Supplementary Angle PPT Figures" PPT tag.

"Supplementary Angle and Supplementary Angle" Preliminary Understanding of Graphics PPT:

"Supplementary Angle and Supplementary Angle" Preliminary Understanding of Graphics PPT Part One Content: Learning Objectives 1. Understand the concepts of supplementary angles and supplementary angles, and master the properties of supplementary angles and supplementary angles. 2. Knowing the azimuth angle can determine the specific orientation of an object. [Learning Key Points] The properties of complementary angles and supplementary angles. ..

"Supplementary Angle and Supplementary Angle" preliminary PPT courseware for graphic understanding:

"Complementary Angle and Supplementary Angle" Preliminary PPT Courseware for Graphic Understanding Learning Objectives Understand the definitions of complementary angles and supplementary angles. Can use the relationship of complementarity and complementarity to perform calculations. Self-study guidance: Use graphics to understand the concepts of complementary angles and supplementary angles. Think about how to find the complement and complement of an angle..

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Update Time: 2024-10-07

This template belongs to Mathematics courseware People's Education Press Seventh Grade Mathematics Volume 1 industry PPT template

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