"Simple Axisymmetric Figures" Axisymmetric PPT in Life (Lesson 1)

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"Simple Axisymmetric Figures" Axisymmetric PPT in Life (Lesson 1)

Part One: Learning Objectives

1. Experience the process of exploring the axial symmetry of simple figures, further understand the properties of axial symmetry, accumulate experience in mathematical activities, and develop spatial concepts.

2. Explore and understand the symmetry and related properties of isosceles triangles.

Simple axisymmetric graphics PPT, part 2: classic examples

[Example 1] If an interior angle of an isosceles triangle is 40°, then its vertex angle is ()

A.100° B.40°

C.100° or 40° D.60°

[Example 2] In △ABC, AB=AC, AD is the midline on the side of BC, BE⊥AC is at point E. Try to explain: ∠CBE=∠CAD.

[Example 3] As shown in the picture, there are two villages, A and B, by the river CD. Now we want to build a water plant E by the river to supply water to villages A and B. Where should the water plant be built to reach villages A and B? What is the distance and minimum? Please find the position of point E in the picture below. (Keep the traces of the drawing, do not write the method)

Simple axisymmetric graphics PPT, the third part: Variation exercises

1. The ratio of the two interior angles of an isosceles triangle is 1:2, then its vertex angle is __________.

2. As shown in the figure, in △ABC, AB=AC, AD is the bisector of ∠BAC. If the perimeter of △ABD is 12 and the circumference of △ABC is 16, find the length of AD.

3. As shown in the picture, there are two villages A and B on the same bank of a river. The two villages want to jointly build a convenience bridge on the river. Where can the bridge be built so that the total distance between the bridge and the two villages is the shortest?

Simple axisymmetric graphics PPT, Part 4: Consolidation training

4. Which of the following figures is not necessarily axially symmetrical ()

A. Equilateral triangle B. Rectangle

C. Isosceles triangle D. Right triangle

5. Which of the following options is not true for equilateral triangles ()

A.Three sides are equal

B. Trigonometric equality

C. is an isosceles triangle

D. There is only one axis of symmetry

6.The axis of symmetry of an isosceles triangle is ____________________.

7. Circles, rectangles, and squares are all axially symmetrical figures. They have ______, ______, and ______ axes of symmetry respectively.

8. In △ABC, AB=AC, ∠A=80°, then ∠B=______.

9. It is known that the length of one side of an isosceles triangle is equal to 4 and the length of the other side is equal to 9, then its perimeter is ______.

Keywords: Free download of Beijing Normal University edition seventh-grade mathematics PPT courseware for the second volume, simple axial symmetry graphics PPT download, axial symmetry in life PPT download, .PPT format;

For more information about the PPT courseware "Axisymmetric in Life and Simple Axisymmetric Figures", please click on the Axisymmetric in Life PPT and Simple Axisymmetric Figures PPT tag.

"Simple Axisymmetric Figures" Axisymmetric PPT in Life (Lesson 3):

"Simple Axisymmetric Figures" Axial Symmetry in Life PPT (Lesson 3) Part One Content: Learning Objectives 1. Experience the process of exploring the axial symmetry of simple graphics, further understand the properties of axial symmetry, accumulate experience in mathematical activities, and develop spatial concepts. 2 .Explore and learn..

"Simple Axisymmetric Figures" Axisymmetric PPT in Life (Lesson 2):

"Simple Axisymmetric Figures" Axial Symmetry in Life PPT (Lesson 2) Part One Content: Learning Objectives 1. Experience the process of exploring the axial symmetry of simple graphics to further understand the properties of axial symmetry, accumulate experience in mathematical activities, and develop spatial concepts. 2 .Explore and learn..

"Simple Axisymmetric Figures" Axisymmetric PPT Courseware 3:

"Simple Axisymmetric Figures" Axisymmetric PPT Courseware 3 Scenario Question 1 Without using tools, please divide an angle made of paper into two equal angles. What can you do? Situation Question 2: For this kind of foldable angle, we can use the angle bisector of the folding method. For...

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Update Time: 2024-11-17

This template belongs to Mathematics courseware Beijing Normal University Edition Seventh Grade Mathematics Volume 2 industry PPT template

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