Fill in the numbers 1-9 with a square with 9 squares, and make it equal to 9 horizontally, vertically and obliquely,

impossible
In order to make its horizontal, vertical and oblique sum equal, the sum of equality must be 15
For such problems, please refer to the Olympic guidance book for grade 4 of primary school,

As shown in the figure, in the square grid of 4 × 4, the size relationship of ∠ 1, ∠ 2, ∠ 3 is______ ．

As shown in the figure, ∵ Tan ∠ cab = bcab = 13, similarly: Tan ∠ bad = 12, Tan ∠ ade = 12, ∵ EDF = 13, Tan ∠ DFG = 13, Tan ∠ GFH = 14, ∵ cab = ∵ def = ∵ DFG, ∵ bad = ∵ ade ＞ GFH, ∵ 1 = ∵ 2 ＞ 3

As shown in the figure, there is a right triangle in the grid (the side length of each small square in the grid is 1 unit 1 length). If one side of the triangle is the common side, draw a new triangle and form an isosceles triangle together with the original right triangle. It is required that the new triangle and the original right triangle have no other common points except one common side, and the new triangle has no other common points The vertex of a shape is not necessarily on the lattice. Then the new triangle that meets the requirements has ()
A. 4 B. 6 C. 7 d. 9

As shown in the figure: ∵ according to the meaning of the title, there are 2 isosceles triangles with 4 as the waist, 4 isosceles triangles with 5 as the waist, 1 isosceles triangle with 5 as the bottom, and 2 + 4 + 1 = 7 new triangles that meet the requirements

There are two different cube dice, each with numbers 1, 2, 3, 4, 5 and 6 on its six sides. Put the two dice on the top of the table
How many cases can the sum of numbers be even?
There are two kinds of cases in which the sum of the numbers on the upward side of two dice is even: odd + odd + even. There are () cases in odd + odd, and () cases in even + even. Therefore, there are () cases in total

There are two kinds of cases in which the sum of the numbers on the upward side of two dice is even: odd + odd, even + even. There are (9) cases in odd + odd, and (9) cases in even + even. Therefore, there are (18) cases in total

Place the cube dice on the desktop, as shown in Figure 1. In Figure 2, roll the dice 90 ° to the right, and then rotate the dice 90 ° counterclockwise on the desktop

The questions are not complete. In the future, it's better to make the questions into documents, and then paste them, so that everyone can help you!

There are two cubes, big and small. The six sides of each cube are marked with numbers 1, 2, 3, 4, 5 and 6 respectively. Throw the two cubes onto the table, and the sum of the numbers on the upward side is even______ Species

According to the list of questions: 1, 2, 3, 4, 5, 6, 1 (1, 1) (1, 2) (1, 3) (1, 4) (1, 5) (1, 6) 2 (2, 1) (2, 2) (2, 4) (2, 5) (2, 6) 3 (3, 1) (3, 2) (3, 3) (3, 4) (3, 5) (3, 6) 4 (4, 1) (4, 2) (4, 3) (4,4) (4,5) (4,6) 5 (5,1) (5,2) (5,3) (5,4) (5,5) (5,6) 6 (6,1) (6,2) (6,3) (6,4) (6,5) (6,6) ‖ there are 36 cases in total, and 18 cases in which the sum of numbers on the upward side is even

There is a cube dice whose numbers on six sides are 1, 2, 3, 4, 5 and 6 respectively. What is the probability of getting the total number by rolling the dice once
What's the probability of getting an even number

The total number is 4 and 6
Possibility: 2 △ 6 = 1 / 3
Even number: 2, 4, 6
Possibility: 3 △ 6 = 1 / 2

As shown in the figure, which two straight lines are cut by which one respectively for ∠ 1 and ∠ 2, ∠ 3 and ∠ 4? What are their angles?

In Figure 1, ∠ 1 and ∠ 2 are the internal stagger angles formed by the straight lines DC and ab cut by dB, ∠ 3 and ∠ 4 are the internal stagger angles formed by the straight lines AD and BC cut by BD; in Figure 2, ∠ 1 and ∠ 2 are the same position angles formed by the straight lines DC and ab cut by CB, ∠ 3 and ∠ 4 are the same side internal angles formed by the straight lines AB and BC cut by AC

As shown in the figure, which two straight lines are corner 1 and corner 2, corner 3 and corner 4 cut by which one? What are the positional angles?

First look at the picture (1)
The two lines AB and CD are cut by BD;
The two lines AD and BC are cut by BD;
It belongs to the internal angle
Look at the picture (2)
The two straight lines AB and CD are cut by BC, which belong to the same side angle;
The two lines AD and BC are cut by AB and belong to the same position angle;

As shown in the figure, angle 1 and angle 2. Which two straight lines are cut by which one are angle 3 and angle 4? What are their position angles
Question 11 on page 9 of mathematics book in volume two of grade seven

In Figure 1:
1 and 2 are the internal stagger angles of AB and CD cut by BD,
The internal stagger angles of AD and BC cut by BD are ∠ 3 and ∠ 4
In Figure 2:
The internal angles of AB and CD cut by BC are ∠ 1 and ∠ 2,
3 and 4 are the same position angles of AD and BC cut by ab

Fill in the numbers 1-9 with a square with 9 squares, and make it equal to 9 horizontally, vertically and obliquely,