"Determination of Isosceles Triangle" Proof PPT Courseware Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
| 文件名 如何下载使用 | 下载次数 | Download Points | 下载地址 |
|---|---|---|---|
| "Determination of Isosce... | 17900次 | 0.00 | Free Download |
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content "Determination of Isosceles Triangle" Proof PPT Courseware is enough.
How to use the Windows system template
Directly decompress the file and use it with office or wps
How to use the Mac system template
Directly decompress the file and use it Office or wps can be used
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view: Click to see
How to create a high-quality technological sense PPT? 4 ways to share the bottom of the box
Notice
Do not download in WeChat, Zhihu, QQ, built-in browsers, please use mobile browsers to download! If you are a mobile phone user, please download it on your computer!
1. The manuscript PPT is only for study and reference, please delete it 24 hours after downloading.
2. If the resource involves your legitimate rights and interests, delete it immediately.
3. Contact information: service@daogebangong.com
"Determination of Isosceles Triangle" Proof PPT Courseware, due to usage restrictions, it is only for personal study and reference use. For commercial use, please go to the relevant official website for authorization.
(Personal non-commercial use refers to the use of this font to complete the display of personal works, including but not limited to the design of personal papers, resumes, etc.)
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view:Please click to see
Authoritative PPT Summary
"Determination of Isosceles Triangle" Proof PPT Courseware
Draw some line segments (such as angle bisectors, midlines, heights, etc.) in the isosceles triangle.
Can you find some of these equal segments?
Can you spot some of these equal angles?
Can you prove the findings?
1. Known: As shown in the figure, in △ABC,
(1) If ∠ABD=∠ABC/2, ∠ACE=∠ACB/2, then BD=CE? What if ∠ABD=∠ABC/3, ∠ACE=∠ACB/3? From this you can get a What conclusion?
(2) If AD=AC/2, AE=AB/2, then BD=CE? What if AD=AC/3, AE=AB/3? What conclusion can you draw from this?
(3) Can you prove the conclusion you obtained?
Here is a mathematical thinking method that summarizes general conclusions from special conclusions.
2. We have already proved that "equilateral angles correspond to equilateral angles", but conversely, "equilateral angles correspond to equilateral sides"?
That is, is a triangle with two equal angles an isosceles triangle?
Known: As shown in the figure, in △ABC, ∠B = ∠C.
Prove: AB=AC.
Analysis: To prove that AB=AC, as long as the two triangles where AB and AC are located are congruent, it is enough.
How do you think? Share your approach with your peers.
For example: draw the midline on side BC; draw the bisector of ∠A or draw the height of side BC.
theorem:
A triangle with two equal angles is an isosceles triangle (equal angles and equal sides).
In △ABC
∵∠B=∠C (known),
∴AB=AC (equiangular opposite sides).
General steps to prove by contradiction:
1. Assumption: First assume that the conclusion of the proposition is not true;
2. Reductio ad absurdum: starting from this hypothesis, applying correct inference methods, and arriving at results that are inconsistent with definitions, axioms, proven theorems or known conditions;
3. Conclusion: The hypothesis is judged to be incorrect based on the contradictory results, thereby confirming that the conclusion of the proposition is correct.
Teacher suggestion:
Proof by contradiction is an important mathematical proof method. It often has unexpected effects when solving certain problems.
You need to make a new friend, "Evidence by Contradiction"!
Keywords: Judgment of Isosceles Triangle courseware, proof courseware, Beijing Normal University edition ninth grade mathematics volume PPT courseware, ninth grade mathematics slide courseware download, Judgment of Isosceles Triangle PPT courseware download, proof PPT courseware download, .ppt format
For more information about the PPT courseware "Proving the Determination of an Isosceles Triangle", please click on the Prove ppt Determination of an Isosceles Triangle ppt tag.
"Determination of Isosceles Triangle" Proof PPT Courseware 2:
"Determination of Isosceles Triangle" Proof PPT Courseware 2 General steps to prove a proposition: (1) Understand the meaning of the question: distinguish the conditions (known) and conclusion of the proposition (prove); (2) Draw the figure according to the meaning of the question; (3) Use symbolic language to write what is known and verified based on graphics; (4) Analyze and explore the meaning of the question.
"Determination of Isosceles Triangle" Axisymmetric PPT Courseware:
"Determination of Isosceles Triangle" Axis Symmetry PPT Courseware Determination of Isosceles Triangle: If there are two angles in a triangle that are equal, then the sides opposite the two angles are also equal. (Equal angles versus equal sides) Analysis: Obviously the length of the rope CD and CE are equal, the problem is actually known..