A math problem doesn t have to be rushed!!!!!!

A polygon with equal inner angles has each inner angle smaller than the outer angle, and the question "one outer angle is equal to 1/3 of an inner angle" is obviously a mistake.

If it is changed to "each inner angle is equal to 1/3 of the outer angle", then the following solution should be given:

The full angle is 360 degrees, divided by (3+1) is equal to 90 degrees, from which it can be determined that this is a rectangle, that is: rectangle or square, the number of internal angles: 90 degrees; Number of sides: 4; Diagonal: 2.

As for the median angle, it comes in various forms and should be the angle formed by the diagonal in this question.

If n edges are provided, the sum of the internal angles is 180*(n-2).

The size of each inner angle is 180*(n-2)n

The size of each outer corner is 180*(n-2) 3n

180*(n-2) 3n+180*(n-2) n=180, n=8 is an 8-sided shape, the number of internal angles is 135 degrees, and the number of diagonal lines is 8*7 2=28 (each corner can make 7 diagonals, and each diagonal occupies two corners).

The median angle may be the one in the middle of the size, which is generally not the case.

The inner angles are equal, then all the sides are also equal, the outer angle + the inner angle = 180 degrees, because the outer angle is equal to 1/3 of the inner angle, so (1 3) the inner angle + the inner angle = 180 degrees, the inner angle = 135 degrees, that is, the number of each inner angle is 135 degrees, assuming that it is an n-sided shape, the sum of the inner angles of the n-sided is (n-2) 180=135n, and the solution is n=8, and the number of sides is 8

In a polygon where the inner angles are equal, the outer and outer angles are the same.

An outer angle is equal to 1/3 of an inner angle, i.e. 4 outer angles = 180 degrees.

So an inside angle is 135 degrees.

Equilateral n-sided, by the formula 180 * (n-2) = sum of the inner angles of the polygon = angle a n

Let this be an n-sided row.

Because the inner angles are all equal, the outer angles are all equal.

Because the sum of the outer angles is 360, so.

360/n=(n-2)180/3n

The solution is n=8, and the number of each inner angle is 6*180 8=135, and the number of diagonal lines = 8(8-3) 2=20

An outer angle is equal to 1/3 of an inner angle

One outer angle + one inner angle = 180 degrees.

Outer angle 45 degrees.

Inner angle = 135 degrees.

Regular 8-sided. Number of each inner angle = 135 degrees.

Number of sides 8 diagonal lines 8 7 2 8 28 8 20

Solution: Let the number of each inner angle be x

then x+1 3x=180 degrees.

x = 135 degrees.

360/n=(n-2)180/3n

The solution is n=8, and the number of diagonal lines = 8(8-3) 2=20

The number of each inside angle is 180 4*3=135 degrees.

Number of edges 360 45=8

Because the sum of the outer angles of any polygon is equal to 360°, an outer angle = 45 degrees, and the diagonal n(n-3) 2 8*5 2=20

A empty tung x B y

18x+23y=20

x+y=118(1-y)+23y=20

18+5y=20

B Lap Block y = A Dou Zhi Tan x =

It doesn't matter how long they run, because they run for the same amount of time, the distance ratio is equal to the speed ratio.

Therefore, the proportion of cats running more distances than mice running is: (=

This question is very simple, since the cat and the mouse run in opposite directions, they must meet after the same time, then since the speed is certain, the time is also certain, then the speed of the cat and the mouse is that the cat runs more than the mouse.

The result: that is, 20%.

1) It is easy to observe the number of equal differences: y1=540+20xy2=630+10x

2) Calculate the profit of each month separately p*(1000-y-50-30) The profit calculated for each month is as follows (10,000 yuan).

4 450 max.

3) The cost of raw materials is 750 + 60 = 810 yuan.

Labor cost 50 (1 + 20%) = 60 yuan.

Other costs are 30 yuan, and the total cost = 900 yuan.

The current price is 1000 (1+a%)

Sales volume 1000 (1+a%)-900]*

1+10a%)(

a~=10

Solution: (1) The functional relationship obtained by ** is a one-time functional relation:

Let y1=kx+b, {k+b=5602k+b=580, and the solution is: {k=20b=540, y1=20x+540, and the functional relationship is a one-time functional relationship by using the image

Let y2=ax+c, 10a+c=730 12a+c=750, and the solution is: {a=10c=630, y2=10x+630

2) From January to September last year, the profit from the sale of the accessories w=p1(1000-50-30-y1), (2(x-4)2+450, (1 x 9, and x is an integer).

2 0,1 x 9, when x=4, w max=450 (10,000 yuan);

From October to December last year, the profit from the sale of the accessory w=p2(1000-50-30-y2),(x-29)2,(10 x 12, and x is an integer),10 x 12,When x=10,w max=361 (10,000 yuan),450 361,In April last year, the profit from the sale of the accessory was the largest, with a maximum profit of 4.5 million yuan.

1.Class 1 = (7 + 5) 48 = 25%.

Second shift = (7+5) 50=24%.

2.Accounts for the whole grade = 2 (7+5) (48+50).

Find the volume of the oil drum first, i.e. the volume of the cylinder.

cubic decimeter) one cubic decimeter of gasoline weighs about kilograms.

==kg.

A: This oil drum can hold kilograms of gasoline.

The volume of the oil drum = bottom area * height = =

Can be loaded with kilograms of gasoline.

π×2×2×5×

The volume of the barrel is the volume, and the volume of the cylinder is multiplied by the weight of each cubic meter of gasoline to be loaded.

The volume of the drum.

is: v= r 2h

(d/2)^2h

cubic decimeters. The weight of gasoline that can be loaded is:

Volume density, ie.

1) 28 1 6 = 168 km Qi Tan The total length is 168 kV Qi meters.

2) 28x(1+3 14)=34 km Gao Tingtong 34 km in the second month.

Solution: If there are x questions that have not been answered, then the answer is incorrect x+1 question, and the correct answer is 20-2x-1 question 5 (19-2x) -2 (x + 1) = 81

95-10x-2x-2=81

12x=12

x=1, then Chen Fei answered 20-2 correctly 1-1=17 (question).

Set no x questions, wrong answers (x+1) questions, correct answers (20-2x-1) = (19-2x) questions.

5(19-2x)-2(x+1)=81

12x=-12

x=1, so answer 19-2*1=17 questions correctly.

If you don't understand, ask again.

Let the non-answer be x, then.

5*（20-2x-1）-2*（x+1）=8195-10x-2x-2=81

12x=12

x=120-2-1=17

Chen Fei answered 17 questions correctly.

If the answer is incorrect, so the one who does not answer is x-1, so the correct answer is 20-(x-1)-x=21-2x.

According to the topic: 5*(21-2x)-2x+0=81 to move the term to get 12x=24

The solution is x=2, so the correct answer is 21-2*2=17

If there are x questions that are not answered, then there are x+1 questions that are answered incorrectly, and there are 20-x-(x+1)=19-2x questions that are answered correctly, and according to the meaning of the question, 5 (19-2x)-2(x+1)=81 is solved, so there are 19-2x=19-2*1*17 questions answered correctly.

Let the non-answer be x; then the wrong answer is x+1;The correct answer is y;

According to the title: 5y-2(x+1)=81;2x+y+1=20

Then you can figure out the answer.

Suppose the answer is incorrect, the answer is x-1 if the answer is not answered, and the answer is 21-2x if the answer is correct

5*（21-2x）-2x=81

x=2 21-2x=17