"Definition and Proposition" Proof of Parallel Lines PPT (Lesson 1)

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"Definition and Proposition" Proof of Parallel Lines PPT (Lesson 1), 22 pages in total.

Part One: Learning Objectives

1. Understand the concepts of definitions and propositions, be able to distinguish the conditions and conclusions of propositions, and write propositions in the form of "if...then...". (emphasis)

2. Understand the concepts of true propositions and false propositions, be able to judge whether a proposition is true or false, and give counterexamples to false propositions. (difficulty)

Definition and Proposition PPT, Part 2 Content: Teaching New Courses

definition

What conclusion can you draw from the above scenario?

Communication requires a common linguistic understanding of certain names and terms to be possible.

The meanings of names and terms should be described and clearly defined. That is, their definitions should be given.

proposition

In conclusion

The above "if...then..." are all sentences that judge something. Sentences like this that judge a thing are called propositions.

Definition and Proposition PPT, Part 3: Practice in class

1. Which of the following sentences are propositions? Which ones are not propositions?

⑴The opposite vertex angles are equal.

⑵ Draw an angle equal to the known angle.

⑶ Two straight lines are parallel and have equal angles.

⑷Are the two straight lines a and b parallel?

⑸Gentle Li Mingming.

⑹ Roses are animals.

⑺If a2=4, find the value of a.

⑻If a2=b2, then a=b.

Definition and Proposition PPT, Part 4: Class Summary

definitions and propositions

proposition

Concept: a sentence that determines an event

Structure: if...then...

Category: true proposition, false proposition

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For more information about the PPT courseware "Proof, Definition and Proposition of Parallel Lines", please click on the PPT Definition and Proposition of Proof of Parallel Lines tab.

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Update Time: 2024-11-20

This template belongs to Mathematics courseware Beijing Normal University Edition Eighth Grade Mathematics Volume 1 industry PPT template

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