1. Analysis topic background: Given an isosceles triangle, its two sides are 4 and 6 respectively. You need to find the circumference of this isosceles triangle.

2. Define variables: suppose that the length of two equal sides of an isosceles triangle is A and the length of the bottom side is B. ..

3. Establish mathematical equations: C=2+b, a=4 (because one side is 4) and b=6 (because the other side is 6).

4. According to the topic, we know that the perimeter c can be expressed by the following formula: bring in the known value and calculate: C=2×4+ 6= 14. Bring a=4 and b=6 into the formula of c, and get.

Comprehensive answer: Therefore, the circumference of an isosceles triangle is 14.

Introduction to mathematical problems:

It is produced by counting, calculating, measuring and observing the shape and motion of objects through abstract and logical reasoning. Mathematical problems can be roughly divided into fill-in-the-blank questions, true and false questions, multiple-choice questions, calculation questions, application questions, proof questions, drawing questions, thinking questions, reading questions, regular questions and problem solving. Skillful problem solving depends on the flexible use of the knowledge you usually study.

Oral calculation questions:

For example: 12+28=40, 5×20= 100, 12y+45y=57y,18y12y =/kloc-0. The purpose is to train pupils' minds and quick reaction ability through mental calculation, oral calculation, quick calculation and clever calculation. For example, it will also appear in the primary school math exam, and it often appears in the junior high school math test paper.

True or false:

1. How to answer the true or false question: the correct answer is marked with "√" in the back bracket, and the wrong answer is marked with "×" in the back bracket. Sometimes options A and B are used.

2. Test center for judging questions: It is nothing more than a few knowledge points (there are many concepts to understand) that are easily confused, and it tests whether the respondents have a thorough understanding of the concepts.

3, problem-solving skills: clear-sighted.

Multiple choice question:

Give any number of options, and then put the serial number of the correct answer in brackets. It is not a correct answer, but you must work out the correct answer first, and then put the serial number of the correct option in brackets. (Generally, the answer sheet is marked with "A", "B", "C" or "D")