Chapter II Pythagorean Theorem

Chapter III Real Numbers

The fourth chapter is a preliminary understanding of probability.

Chapter V Plane Cartesian Coordinate System

Chapter VI Linear Function Junior High School Mathematics/Shandong Education Press/Shandong Education Press, Grade 7, Volume I/Chapter I Axisymmetry in Life /2. Simple axisymmetric figure

1, the following statement is correct: () (a) The angle is an axisymmetric figure, its bisector is the bisector of the internal angle of an isosceles triangle with symmetry axis (b), and the three lines of the median line and height are one [source:] (C) The right triangle is not an axisymmetric figure (d) The isosceles triangle has three symmetry axes. 2. One internal angle of an isosceles triangle is 50, so the other two internal angles are 50.

1.3 The Nature of Axisymmetry Practice Junior High School Mathematics/Shandong Education Press/Shandong Education Press, Grade 7, Volume I/Chapter 1 Axisymmetry in Life /3. Explore the essence of axial symmetry.

As shown in the figure, 1 is a triangular piece of paper. Fold this triangle along a straight line passing through this point, so that the vertex falls on the point on the side, the crease is 0, and the circumference is cm.2 As shown in the figure, if □ABCD and □EBCF are symmetrical about the straight line where BC is located, ∠ Abe = 90, ∠ F = 3, life. The folding process is like this (the shaded part represents the reverse side of the note +0.4. Practice junior high school mathematics with axisymmetric design patterns/Shandong Education Press/Shandong Education Press, the first volume of grade seven/Chapter 1 Axisymmetry in life /4. Use the axisymmetric design pattern.

1. The key to making an axisymmetric figure is to find the _ _ _ _ _ of a point, and the axis of symmetry is known. To be the other part of an axisymmetric figure, you can get the other part of an axisymmetric figure by making _ _ _ _ _ of some key points and then connecting _ _ _ _ of these key points. 2. As shown in the figure. The point corresponding to point A is _ _ _ _ _. N, the corresponding angle is _ _ _ _ _. The symmetrical segment of the straight line AR is _ _ _ _ _. 3. Junior high school mathematics look in the mirror/Shandong Education Press/Shandong Education Press, the first volume of grade seven/Chapter 1 Axisymmetry in life /5. Edge grinding and paper cutting.

Group exercise: Exercise 1: As shown in the figure, take the straight line passing through point A and point B and perpendicular to AB as the symmetry axis, respectively, and make figures that are symmetrical to the figures in the figure (draw one on the left and right of each figure). Imagine what kind of flower border patterns will be obtained by making such symmetrical figures continuously, and design several novel lace patterns by yourself. ABBA Mathematics: Chapter 1 Axisymmetric Level Test in Life (Grade 7 of Shandong Education Press) Junior Middle School Mathematics/Shandong Education Press/Grade 7 Volume 1 of Shandong Education Press/Chapter 1 Axisymmetric Level Test in Life.

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The first chapter "Axisymmetry in Life" reviews the level test in the whole chapter. 1. Fill in the blanks and believe in your ability! (3 points for each small question, ***27 points) 1. Yes, and, if, then _ _ _ _ _ _ _. 2. One angle of an isosceles triangle is, then its two bottom angles are _ _ _ _ _ _. 3. Yes, that's it. Because _ _ _ _ _ _ _ _. 4. The isosceles triangle with the base angle equal to half of the top angle is _ _ _ _ Mathematics: 1. 1 Synchronous practice of axisymmetric phenomenon (seventh grade of Shandong Education Press) Junior high school mathematics/Shandong Education Press/Shandong Education Press, seventh grade, Volume I/Chapter I Axisymmetric phenomenon in life/1.

I. True or false 1. Axisymmetric graphics have only one axis of symmetry. () 2. The symmetry axis of an axisymmetric figure is a line segment. () 3. Two figures form an axis of symmetry, and they are congruent figures. () 4. Two congruent figures must form an axis of symmetry. () 5. Axisymmetric figure refers to two figures. () 2. Fill in the blanks 65438.