"Exploring the Conditions for Similarity of Triangles" Similarity of Figures PPT Courseware 2

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"Exploring the Conditions for Similarity of Triangles" Similarity of Figures PPT Courseware 2

Review review:

Triangle similarity determination method

1. The definition of similar triangles can be used as a method to determine the similarity of triangles.

2. Two triangles with equal angles are similar.

Explore: If two sides of one triangle are proportional to two sides of another triangle and their angles are equal, are the two triangles similar?

If △ABC and △A'B'C' are proportional and the angles subtended by one of them are equal, then are the two triangles similar?

Xiao Ming and Xiao Ying respectively drew triangles as shown in Figure 3-15. What conclusion can you draw from this?

Knowledge and skills

1. The lengths of the two right-angled sides of a right triangle are 6 cm and 4 cm respectively, and the lengths of the two right-angled sides of another right triangle are 9 cm and 6 cm respectively. Are these two right triangles similar? Why?

2. In △ABC, ∠ B = 39°, AB = 1.8 cm, BC = 2.4 cm; in △DEF, ∠ D = 39°, DE = 3.6 cm, DF = 2.7 cm. Are these two triangles similar? Why?

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For more information about the PPT courseware "Exploring the Similarity of Conditional Figures with Similar Triangles", please click the Similarity ppt tag of "Exploring the Similarity of Conditional Figures with Similar Triangles".

"Exploring the Conditions for Similarity of Triangles" Similar Figures PPT Courseware 6:

"Exploring the Conditions for Similarity of Triangles" Similar Figures PPT Courseware 6 Review the past and learn new things 1. What are similar triangles? Two triangles in which the angles are equal and the sides are proportional are called similar triangles. 2. What are congruent triangles? The triangles correspond to equals, and the three sides correspond to...

"Exploring the Conditions for Similarity of Triangles" Similar Figures PPT Courseware 5:

"Exploring the Conditions for Similarity of Triangles" Similar Figures PPT Courseware 5 Review and Thinking [Congruent Triangles] Two triangles with the same shape and equal size. That is: a triangle corresponds to three equal sides and two equal triangles are congruent. [Similar triangles] have the same shape and size..

"Exploring the Conditions for Similarity of Triangles" Similar Figures PPT Courseware 4:

"Exploring the Conditions for Similarity of Triangles" Similar Figures PPT Courseware 4 Learning Objectives 1. Preliminarily master the conditions for determining the similarity of two triangles. 2. Experience the exploration process of two triangles with similar conditions to further develop students' exploration and communication abilities, as well as oral, hands-on,...

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Update Time: 2024-09-27

This template belongs to Mathematics courseware Beijing Normal University Ninth Grade First Volume Mathematics industry PPT template

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