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The third unit of the second day of junior high school summarizes that the differences and similarities of axisymmetry, rotation and translation are the same
Difference: the characteristic of translation is that the trajectory of each point is the same, and each point on the graph can represent the motion of the whole graph, which is why when studying the translational motion of an object, the object can be abstracted into a physical model - particle. The characteristic of rotation is that the trajectory of each point is a
Definition of translation
It refers to the movement of all points on a graph at the same distance in a certain direction in the plane. Such graphic movement is called graphic translation movement, which is called translation for short. Translation does not change the shape and size of the graph. Translation can not be horizontal
What is translation, the characteristics of translation
Translation is horizontal movement. The characteristic is that no matter how many times you move, you are on the same horizontal line
Translation features (1) The translated drawing is the same as the corresponding line segment in the original drawing_____ And __; (2) Line segment connecting corresponding points_______ And __
Parallel, equal
Equal, parallel
Translation features!
The characteristic of translation is that the trajectory of each point is the same, and each point on the graph can represent the motion of the whole graph, which is why the object can be abstracted into a physical model - particle when studying the translational motion of the object
Definition of rotation
The graphic transformation of turning a figure around a point O by an angle is called rotation. That is, rotation is the phenomenon that an object moves on a circle centered on a point or an axis, and it is not necessary to make a circular motion. Therefore, swing is also rotation, so the motion of swing, pendulum and seesaw is swing and rotation at the same time
RELATED INFORMATIONS
- 1. What are the properties of rotation
- 2. The connection and difference between translation and rotation is
- 3. Optimization of mathematics class hour of Beijing Normal University in Grade 7 1.8 complete square formula
- 4. Standard definition question no 1. Xiao Wang runs an online store and specializes in clothes of a certain brand. Due to the impact of recent inflation, the clothing of this brand has been reduced twice on the basis of the original price of 1200 yuan, and the percentage of each reduction is x, so the current price of the commodity is____________ Element (the result is expressed by the formula containing x) 2. If the solutions of equation 6x + 3 = 0 and 5x + k = 20 with respect to X are reciprocal to each other, then the value of K is ______ 3. Define new operations @ for positive rational numbers a and B as follows: a@b = [(ab+b ²)/ (a-b)], then 2@3 =____________ . 4. Calculate 12 ° 17 ' × The result of 4 - 23 ° 24 ′ 36 ″ is ____ 5. If (3 + a) ²+ | B-2 | = 0, then the value of 3a-2b-2012 is ____ 6. If it is known that the complement angle of an angle is 10 ° more than 3 times of its remainder angle, then this angle is equal to ___________
- 5. (1) Inject water into a rectangular tank with a length of 2 decimeters and a width of 1 decimeter. When the water in the tank appears square for the second time, inject () liters in total (2) Party A and Party B have the same two cups. Cup a has only half a cup of water, and cup B is filled with 50% salt water. First pour half of cup B salt water into cup a, mix well, and then pour half of cup a salt water into cup B. at this time, the salt in cup B accounts for (- ---) of the salt water
- 6. Three math blanks 1、 The road repair team has repaired 85% of a highway, and there are still ()% not repaired; If there are still 30 kilometers left, the road will be () kilometers long 2、 A pail of pure milk is 20 liters. After drinking 5 liters, fill it with water. This is the concentration of this pail of milk, which is ()% 3、 3 divide by () = 18 = (): 16 = ()% = 75% It's urgent. You can answer any question you can, and you can answer all the last three questions
- 7. Who knows about mathematician stories, interesting mathematical stories, and mathematical knowledge? I want to make a handwritten newspaper, as long as it is about mathematics! Please help me find more and shorter, because I want to make a manual copy! thank you very mnsh! I repeat, shorter!
- 8. What are the properties of translation and axisymmetry? What about rotation?
- 9. Give some examples of the constant movement of molecules in life The more, the better. A little more detail = = | (just a little more detail.)
- 10. Is the pendulum of a pendulum moving in translation or rotation The sooner the better
- 11. If the image of the square of the function y = x is perpendicular to the tangent of the function image translated by the vector a = (m, 1) at x = 1, then M= nothing
- 12. On the buoyancy of ships and stones entering the sea from the river I know that because the density of river water is different from that of sea water, the water level of ship entering the sea rises But also into the sea, the stone has always been at the bottom. Has its density changed?
- 13. How do we know the temperature outside the high air plane?
- 14. Is the buoyancy equal to the force on the object?
- 15. Several blank filling questions in Mathematics ① A number consists of 4 percentages, 3 ones and 48 percentages. This number is () ② The product of two factors is 8.42. If one factor is 10 times larger than the other factor, the decimal point of the other factor moves two digits to the left, and the product is () ③ Two out of nine molecules increase by 6. If the fraction size remains the same, the denominator should increase ()
- 16. What about vector translation scalar shift Given the straight line L: x-2y + M = 0, the straight line L1 and circle (X-2) obtained by translating according to the vector a = (2, - 3) ²+ (y-1) ²= 5 tangent, m value?
- 17. Translate by vector By translating the image of function f (x) = 2Sin (x-pie / 3) according to vector a = (Pie / 6,2), the function desorption formula is
- 18. What determines the translation of a graph? What and what does not change after the translation of a graph
- 19. Translation does not change what and what of the graph, but only what of the graph?
- 20. (Translated) The following motions are not translational: A. The sliding of a car on the ground when braking hard B. The plane accelerated on the runway before taking off C. The movement of a kite in the air D. Cable car movement in the mountains