"Determination of Parallel Lines" Proof of Parallel Lines PPT Teaching Courseware

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"Determination of Parallel Lines" Proof of Parallel Lines PPT teaching courseware, 17 pages in total.

Part One Content: Basic Knowledge Key Points

Knowledge point 1: Equivalent angles are equal and two straight lines are parallel

1. In the following figure, from ∠1=∠2 we can definitely get AB∥CD (A)

2. As shown in the figure, in the same plane, if two straight lines b and c are perpendicular to the same straight line a, then the positional relationship between straight line b and straight line c is b∥c.

Knowledge point 2: Internal offset angles are equal and two straight lines are parallel

3. As shown in the figure, point E is on the extension line of AB. Which of the following conditions can determine AD∥BC (B)

A.∠1=∠3 B.∠2=∠4

C.∠C=∠CBE D.∠CBE=∠1

Judgment of Parallel Lines PPT, Part 2: Improvement of Comprehensive Ability

8. The intersection of five straight lines l1, l2, l3, l4 and l5 on the plane is as shown in the figure. According to the angles marked in the figure, the following statement is correct (A)

A.l1 and l3 are not parallel, l2 and l3 are parallel

B.l1 and l3 are not parallel, l2 and l3 are not parallel

C.l1 and l3 are parallel, l2 and l3 are parallel

D.l1 and l3 are parallel, l2 and l3 are not parallel

Judgment of Parallel Lines PPT, Part 3: Expansion, Research and Breakthroughs

14. As shown in Figure 1, CE bisects ∠ACD, AE bisects ∠BAC, ∠EAC+∠ACE=90°.

(1) Please judge the positional relationship between AB and CD and explain the reason;

(2) As shown in Figure 2, when ∠E=90° and the positional relationship between AB and CD remains unchanged, move the right-angled vertex E so that ∠MCE=∠ECD. When the right-angled vertex E moves, ask ∠BAE and ∠MCD Is there a definite quantitative relationship? And explain the reason.

(3) As shown in Figure 3, P is a certain point on line segment AC, Q is a moving point on straight line CD and the positional relationship between AB and CD remains unchanged. When point Q moves on ray CD (except point C), ∠CPQ+ What is the quantitative relationship between ∠CQP and ∠BAC? Guess the conclusion and explain the reason

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

"Determination of Parallel Lines" Proof of Parallel Lines PPT Download:

"Determination of Parallel Lines" Proof of Parallel Lines PPT download, 20 pages in total. The first part of the content: Learning objectives: Use the relationship between angles to determine that two straight lines are parallel. Use a third straight line to determine that two straight lines are parallel... Determination of parallel lines PPT, the second part of the content: Insights...

"Determination of Parallel Lines" Proof of Parallel Lines PPT:

"Determination of Parallel Lines" Proof of Parallel Lines PPT, 20 pages in total. Part One: Learning Objectives 1. Understand and master the axioms and theorems of parallel lines. (Key points) 2. Understand the general steps of proof. (Difficulty) ... ... ... Judgment of parallel lines PPT,...

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Update Time: 2024-10-03

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

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