"Properties of Similar Triangles" PPT courseware

Description

"Properties of Similar Triangles" PPT courseware

learning target

1. Master the properties theorem of similar triangles.

2. Master the comprehensive application of the determination theorem and property theorem of similar triangles to solve problems.

3． Further experience the learning idea of ​​analogy.

4. Through learning of similar nature, feel the harmonious beauty of graphics and language

1: △ABC∽△A'B'C'

AD and A'D' are the heights of △ABC and △A'B'C' respectively. Let AB/A'B'=k

So AD/A'D'=?

Conclusion: The ratio of corresponding heights of similar triangles is equal to the ratio of corresponding sides.

Two: △ABC∽△A'B'C'

AD and A'D' are the angle bisectors of △ABC and △A'B'C' respectively. Let AB/A'B'=k

So AD/A'D'=?

Conclusion: The ratio of the corresponding angle bisectors of similar triangles is equal to the ratio of the corresponding sides.

Three: △ABC∽△A'B'C'

AD and A'D' are the midlines of △ABC and △A'B'C' respectively. Let AB/A'B'=k

So AD/A'D'=?

Conclusion: The ratio of the corresponding midlines of similar triangles is equal to the ratio of the corresponding sides.

Try your hand:

1. The similarity ratio of two similar triangles is 2:3, the ratio of their corresponding angle bisectors is ________, the ratio of their perimeters is ________, and the ratio of their areas is ________.

2. If the ratio of the areas of two triangles is 16:9, then the ratio of their heights is _____, and the ratio of their corresponding midlines is _____

Compliance test

1. The ratio of the areas of two similar triangles is 1:3. What is the ratio of their corresponding sides?

2. The ratio of the corresponding sides of two similar triangles is 2:3, and the sum of their areas is 78 square centimeters. Find the areas of the two triangles?

3. As shown in the figure, the vertices of the rectangle MNPQ are all on △ABC, BC=24, height AD=16, and PN=2PQ, find the length of PN

Keywords: Teaching courseware on the properties of similar triangles, Qingdao edition ninth grade mathematics volume 1 PPT courseware download, ninth grade mathematics slide courseware download, Properties of similar triangles PPT courseware download, .PPT format;

For more information about the "Properties of Similar Triangles" PPT courseware, please click on the "Properties of Similar Triangles" ppt tab.

"Properties of Similar Triangles" PPT Courseware 3:

"Properties of Similar Triangles" PPT Courseware 3 Situation Introduction: Known: ABC∽A'B'C', according to the definition of similarity, what conclusions do we have? Viewed from corresponding sides: __________________ Viewed from corresponding angles: __________________ Two triangles..

"Properties of Similar Triangles" PPT Courseware 2:

"Properties of Similar Triangles" PPT Courseware 2 1. The ratios of the corresponding heights, the ratios of the corresponding midlines, and the ratios of the corresponding angle bisectors of similar triangles are all equal to ________. 2. The ratio of the perimeters of similar triangles is _________. 3． The ratio of the areas of similar triangles is equal to______..

"Properties of Similar Triangles" Similar PPT Courseware of Figures 3:

"Properties of Similar Triangles" Similarity of Figures PPT Courseware 3 Fill in the blanks: The _______ of two similar triangles are equal and _______ are proportional. The ratio of the corresponding heights of similar triangles, the ratio of the corresponding midlines of similar triangles, and the ratio of the corresponding angle bisectors of similar triangles are all equal to...

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Update Time: 2024-10-19

This template belongs to Mathematics courseware Qingdao Edition Ninth Grade Mathematics Volume 1 industry PPT template

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