Math Problem 2 Hurry Hurry Hurry Hurry

1.The radius of the bottom surface is 2 decimeters, and the side area + bottom area = 2 * 2 * 6 + * 2 * 2 = square decimeters.

2.The area of the bottom of the cylinder is, volume =

3.Bottom radius = , bottom area = , m.

7.Cylinder bottom circumference:,Base radius:,About the current volume:

8.Weight volume = , bottom area of weight, height: 157

1.Side area + bottom area = 2 * 2 * 6 + * 2 * 2 = square decimeters.

2.Volume = m. 7.Volume:

8.High: 157

I've got time to help you figure it out! You have this test paper, I just happened to have done it. But I won't tell you. I believe you will definitely do it, just be too lazy to do it, come on, use your own wisdom to solve it! (*Hee-hee.......)You don't know how to ask me.

+α=a2+∠a3+……an-2+∠an-1+∠a1+∠an∠a1+∠a2+∠a3+……an-2+∠an-1+∠an（n-2）×180°

The sum of the internal angles of the n-sided = (n-2) 180°

This is a lot of deformation, right?

If yes, =180°

n-2）×180°

i.e., =n-3).

1.405 (1+7 45)=468 (m) Answer: The Oriental Pearl TV Tower is 468 meters high.

2.36 1 3 = 12 (sheets).

36 + 12 = 48 (sheets).

A: Xiaohua has 12 more stamps than Xiaofang, and Xiaohua has 48 stamps.

The height of the Oriental Pearl Tower is 405*(1+7 45)=468;

The number of stamps of Xiaohua is 36*(1+1 3)=48;Xiao Hua has 12 more stamps than Xiao Fang.

1. 16/25 9/25 9/25.

2. Seven out of ten and ten out of seven.

3. Choose 14 and choose 1

5. Let this number be x

Four-fifths x+x=27

x = 15 Answer: ......

6. The length is 4x, the width is 3x, and the height is 2x (4x+3x+2x) 4=144x=4v=abh=16 12 8=15767, and x 2x+3x+5x=180 x=182x=36 3x=54 5x=90

So it's a right-angled triangle.

8 Let x x - one-fifth x - quarter x = one-fifth x quarter x + 27x = 270kg

9 Let x (9600+x) seven-twelves = x + 4700x = 2160

3) The first.

6) Set the length to x

4*x+3 4*x*4+2 4*x*4=144 is solved to get x=16

The length is 16, the width is 12, and the height is 8

7) is a right-angled triangle with a triangle of 36, 54, 90 degrees.

8) Set a total of x kilograms.

1 5*x+1 4*x+1 5*x+1 4*x+27=x, x=270 kg.

9) Set up a refrigerator x yuan.

Get 7 12*(9600+x)=4700+x, and get x=2160 yuan.

8 (10 10 + 15 15) = 2600 cubic centimeters.

2) 25 2 = centimeters.

40 25+ square centimeters.

3) 25 4 + 40 4 + 30 = 290 cm.

3.(1) 22 15 2 = 660 cubic centimeters.

2) 22 15 2 22 2 60 15 2 60 = 5100 square centimeters.

4 .Centimeter.

Cubic metre.

Original price of cake = 150 * 3 4 = 112,5

The boss earned = 140-112, 5 = 27,5

1, v1 = 8 * 15 2 Pa, v2 = 8 * 10 2 Pa, and then add.

2,16*30Pa+15 2Pa=.

1.The diameter of the water pipe is 2 cm, and the flow rate of water in the water pipe is 8 cm per second. A classmate went to the sink to wash his hands and forgot to turn off the faucet when he left, wasting water (liters) for 5 minutes.

2.In a cuboid tank 40 cm long, 20 cm wide and 30 cm high, it is filled with water 15 cm deep. Now submerge a cube of stones with a side length of 10 cm in water, what is the height of the water in the tank now?

1000=40*20x, x=, 15+cm.

What a waste of people now.

cubic centimeter = liter.

Solution: Let the distance be x kilometers, according to the question:

x-(1/3x+28)-(50%-8)=0x-1/3x-28-50%x+8=0

1/6x=20

x = 120 (km).

We took the test, and the answer was 120, believe me, there is nothing wrong.

Take the midpoint G of BF and connect AG

Obviously the triangle ABE is congruent with CAD.

Angle Abe Angle CAD

The triangle abg is equal to caf, ab=ac, bg=af, and the upper two angles are equal and congruent.

AG CF triangle AEG congruence with CFD.

Angular cfd