How to learn math geometry in middle school Is math geometry in junior high school

Pre-class reading. When preparing the text, prepare a piece of paper and a pen, write down the key words, questions and questions that need to be considered in the textbook, and simply repeat the definitions, axioms, formulas, laws, etc. on the paper. Key knowledge can be marked, marked, circled, and pointed in the textbook.

Doing so will not only help us understand the text, but also help us to concentrate and focus in class.

Classroom reading. Therefore, it is necessary to mark and annotate the materials made during the preview, combined with the teacher's teaching, and further read the texts, so as to grasp the key points and solve the difficult problems in the preview.

Review the reading after class. After-class review is an extension of classroom learning, which can not only solve problems that are still not solved in preview and class, but also systematize knowledge, deepen and consolidate the understanding and memory of classroom learning content. After a lesson, you must read the textbook before doing your homework; After a unit, you should read the textbook comprehensively, link the content of the unit back and forth, make a comprehensive summary, write a summary of knowledge, and fill in the gaps.

These three aspects are more important.

Junior high school mathematics is not only geometric, junior high school mathematics is mainly divided into three parts, algebra part, geometry part, statistics and probability part.

Algebraic part. 1. Numbers and formulas: This part includes real numbers, integers and factorization, fractions, quadratic radicals, etc.

2. Equations (systems) and inequalities (groups): This part includes the solutions and applications of primary equations (systems), fractional equations and applications, unary quadratic equations and applications, and unary inequalities (groups) and applications. 3. Functions:

This part includes primary functions, inverse proportional functions, quadratic functions, etc. Familiar with the image and properties of functions, will use the undetermined coefficient method to find the analytic formula of the function, preliminarily form modeling ideas, and establish the thinking mode and classification ideas of the combination of numbers and shapes.

Geometric sections. 1. Triangle: This part includes lines, angles, intersecting lines and parallel lines, triangles and polygons, isosceles triangles and right-angled triangles, congruent triangles, similarity of figures, and acute trigonometric functions.

2. Parallelogram: This part includes the properties and judgments of parallelograms, rectangles, diamonds, and squares. It is necessary to be familiar with the connections and differences between several special quadrilaterals, and to grasp their properties and judgment methods.

3. Circle: This part contains the relevant concepts and properties of the circle, the position relationship related to the circle, and the calculation related to the circle. The content of this chapter is an important part of junior high school geometry, 4. Figures and Transformations:

This section covers ruler drawing, view and projection, symmetry, translation and rotation.

Statistics & Probability.

1. Statistics: This part includes statistical charts, mean, median, mode, and variance. Students are required to be able to obtain information through statistical charts.

2. Probability: This part includes the formula method, the list method and the tree diagram method to find the probability of random events. Frequency is used to estimate probability.

This is not appropriate. Middle school math is not geometry, it has not only geometry, but also algebra.

Mathematics, on the other hand, is a scientific way of studying the meaning of quantities, structural changes, spatial models, etc., and it is the basis for subjects such as physical chemistry. And it has a lot to do with our daily lives, so learning mathematics is very important for each of us. Let's introduce you to how to learn junior high school mathematics!

It is also necessary to learn mathematics, because mathematics is a subject that I have been exposed to since kindergarten, and it would be too embarrassing to say that I don't know mathematics. Here are some tips on how to learn middle school math:

Middle School Mathematics Whole Formula Summary.

1. The study of everyday mathematics.

First of all, in the usual study of mathematics, you need to prepare carefully before class. The purpose of the preview is to be able to better absorb the knowledge taught by the teacher in class, after passing the preview. Our grasp is generally about 80%.

Later, in the preview, what you don't understand has to be solved in class. If you don't know what you need, you need to pay attention to it, and then you can do more example questions to consolidate.

And the specific method of preview is as follows: finish the title of the whole book first, and draw the meaning of the knowledge points at the same time. This process takes about half an hour, and if you have time permitting, you can also do the practice questions that you can write first, and wait until tomorrow when the teacher gives a lecture.

Secondly, learning math needs to be combined with practice problems, and it is useless to say that you only listen to lectures in class. Because although you say that you understand, but you still can't do the problems, so the mathematics focuses on doing the problems, and on the basis of listening, you still have to do more practice problems, because the practice problems are more. After yours.

The ability will gradually increase. If you encounter a difficult problem, you must ask questions that you don't understand, ask if you don't understand, you can't swallow it, and no one will say it, otherwise you will still not be able to encounter these questions during the exam.

After finishing the homework, you need to read the content of the day again to consolidate the basics. Then buy some workbooks, or search for some questions on the Internet and do them again. This will help you improve your math scores.

Actively do the questions. Two: Skills during the exam.

If you want to get a high score, you need to fill in the blanks and calculate the questions so you need to be cautious. If you don't know how to do a question at first, but then suddenly understand it, you must be calm, don't write blindly, write it on scratch paper first, and then put it on the answer sheet.

These are some tips on how to learn middle school math. I hope you can understand that. In fact, it is not difficult to learn mathematics, the important thing is to do more problems. and learn the skills of question types.

Do more questions, draw more pictures, geometry sometimes.

Imagination is needed, when you can't figure out how to solve the problem from one direction, you can turn the test paper around and look at it, and you may be inspired from other angles, in short, do more questions, think more, calm down and make friends with the topic, don't be afraid of trouble, when you solve the problem, it is to save your friend from the difficulties, and you will taste the joy of success by patiently solving the problem.

Select C for this question

Problem solving idea: use the volume of the ball v=4 丌r 3 3=32 丌 3 to get the radius of the ball r=2, pq=4;Then use the right triangle PAQ and the specific process is shown in the diagram.

Learn ideas first, such as knowing what conditions to build what kind of triangles, parallelograms, diamonds, rectangles, etc., as well as angular dividers, midline perpendiculars, etc. The second is to see more questions. The more questions you have, the better, and each question should be targeted.

It was relatively easy to learn geometry at first, but by the third and fourth years of junior high school, like me, geometry was mainly embodied in proof problems. At the beginning of the question, each question should be done against the answer, and even if you get it right, the answer may be an easier way than your home. To understand the train of thought.

There's also a folded graphic, I don't know if you've come across it now. It is not necessary to draw the image before or after it is folded first, but to analyze the conditions she gives you.

Junior high school geometry is a subject that studies the shape, size and position relationship between plane figures, so it is necessary to learn junior high school geometry well.

Figures are studied one by one according to the characteristics of this discipline. Familiarity with some basic figures and their properties, and learning to break down more complex shapes into several basic shapes is the key to learning.

Of course, to learn any subject, you must study hard and practice hard to make perfect. Asking for a tutor is not necessarily useful, you have to rely on yourself.

Combination of numbers and shapes, more drawings. Push it when the theorem is fine. Know the principle of the theorem.

Use it rationally and do more questions. Do an extra four big questions a week. Hang on.

Don't flout your homework. Homework is the mother of 10,000 volumes. ）

Combination of numbers and shapes. If you really find it difficult, it is also a good way to ask for a tutor, someone to tutor, but the main thing is to rely on yourself.

It is easy to memorize theorems and laws, understand them thoroughly, and learn them well.

From the simplest mastery, two points will determine a straight line, three points will decide a circle, solve a problem into the simplest concept, think repeatedly, make small changes by yourself, if you are interested, your grades will improve rapidly, ask for a tutor is passively accepted, easy to get bored, I don't agree.

Listen carefully in class and make some papers, preferably from the basics.

Master the rules, principles, laws, and do more question types, and it will be easy to learn!

Geometry should first memorize theorems, definitions, decision theorems, axioms, etc., and summarize and summarize the method of problem types after doing more questions, and solve the problem.

Memorizing the theorem is not a problem.

It's okay, the key is to look at the model more and cultivate spatial imagination.

(1) Prove: the extended dc intersects be at the point m, be ac, ab dc, the quadrilateral abmc is a parallelogram, cm=ab=dc, c is the midpoint of dm, be ac, df=fe;

2) Solution: Cf is the median line of DME obtained from (2), so ME=2CF, and AC=2CF, the quadrilateral ABMC is a parallelogram, BE=2BM=2ME=2AC, and AC DC, and the Pythagorean theorem is used in RT ADC to obtain AC=3 times the root number of the second A, and the root number of the BE is 3 times A

3) The area of the quadrilateral ABED can be divided into two parts, trapezoidal ABMD and triangular DME, DC=A2 is obtained by using the Pythagorean theorem in RT ADC, CM=DC=A2 is obtained by CF is the median of DME, AM=MC=A2 is obtained by quadrilateral, BM=AC=3 times the root number of the half

The trapezoidal ABMD area is 3/8 times the root number 3 times A;

From AC DC and BE AC, it can be proved that the triangle DME is a right triangle with an area of 3 times the root number of 4 times A:, and the area of the quadrilateral ABED is 5 times the root number 3 times A

Geometry in junior high school mathematics, then you must first destroy the various shapes of geometry first and burn it to the next thought, what are its properties, what are its characteristics, and then how to test the exam questions?

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1.First of all, you need to understand the definitions and theorems, these are the tools you need to use, and when you face a problem, you must first understand what kind of tools you have in your hand to solve what kind of problem.

2.The second is to establish a clear knowledge framework diagram, how to use the knowledge points, and how they are related to each other to have a relatively clear context. Some students perform well in the in-class tests and homework, but the test of comprehensive questions does not go well, that is, there are problems in the comprehensive application of knowledge points, which is caused by the lack of organic combination between knowledge.

3.There are some methods when learning geometry: the model idea of mathematics in junior high school is very prominent, only the presentation of new knowledge in the book is relatively fixed, and the method of solving problems also has relatively similar strategies. It is also a good way to learn mathematics by dismantling the wrong questions, and reviewing the problems that you have made mistakes in the core of the brigade is also a good way to learn mathematics; Organize the commonly used mathematical ideas in mathematics, and do not get lost when solving problems; Treat each assignment as an exam, and give it psychologically, timely, and methodically.