As soon as this problem appeared, many candidates felt miserable and felt beyond their own cognitive range of mathematics. Although I am not a college entrance examination student this year, I have also seen this problem. To tell the truth, this question is really simple for a science student like me. It is nothing more than a question of proportion, which can be obtained by dividing it into two sides.
Let's look at the stalk first. This is a regular quadrilateral. The first thing that comes to mind is the properties of regular quadrangles. The bottom is square. Moreover, the stem also tells us the relationship between the height and the bottom of this regular pyramid. The area of the bottom square is equal to the area of the triangle on the side. This is a very regular rule pyramid. There are many exercises, and you can know the answer to this question by adding the root number of five to four from memory.
If we calculate the formula, the pyramid is higher than H, the side length is equal to A, and the bottom height of the side triangle is h 1, then we can get that the square of H is equal to three-quarters of the square of the root sign, and then the side triangle is an equilateral triangle, so we can calculate the relationship between h 1 and A. Finally, we simplify and merge the two formulas. I remember what my math teacher said in the first class when I was a freshman. These are the most basic applications. So that you can get the right answer.
This question is really answered in seconds. Many people find it difficult. If it is really difficult, it will not be placed in the first five questions. In fact, this problem has great consistency and similarity with the height of Venus last year. Last year, although the height of Venus stumped many people, a ratio could be calculated, but the calculation was complicated. And this question is purely about your knowledge of geometry and the use of letters. Read the question carefully and think about the answer to it a little. It's actually quite simple.