Use a scale and a compass to make a line so that its length is 10 cm Please write the way, thank you!

Use a scale and a compass to make a line so that its length is 10 cm Please write the way, thank you!

Make right triangle, right side is 1,3, hypotenuse = root 10
Make a right angle. The two sides of the right angle are 1cm.3cm respectively. Then connect them. The line segment is 10cm root
Make right triangle, right side is 1, 3, hypotenuse = root 10
Given the line segments a, B and C, draw a line segment with a ruler and a compass to make it equal to a-c + B. be sure to write the steps
1. Draw a ray OA
2. Use the two feet of a compass to align the two vertices of line segment a respectively
3. Take o as the center of the circle and a as the radius to make arc intersection OA with B
4. Measure length C with the method in step 2
5. Take B as the center of the circle, B as the radius, make arc intersection on the left side of B, OA as C
6. Measure length B with a compass
7. Take C as the center of the circle, B as the radius, and make arc intersection OA at d on the right side of C
Then: od length is the line segment (A-C + b)
(sorry, the picture can't be sent)
1. Draw a ray OA
2. Use the two feet of a compass to align the two vertices of line segment a respectively
3. Take o as the center of the circle and a as the radius to make arc intersection OA with B
4. Measure length C with the method in step 2
5. Take B as the center of the circle, B as the radius, make arc intersection on the left side of B, OA as C
6. Measure length B with a compass
7. Take C as the center of the circle, B as the radius, and make arc intersection OA at d on the right side of C
Then: od length is the line segment (A-C + b)... Expansion
1. Draw a ray OA
2. Use the two feet of a compass to align the two vertices of line segment a respectively
3. Take o as the center of the circle and a as the radius to make arc intersection OA with B
4. Measure length C with the method in step 2
5. Take B as the center of the circle, B as the radius, make arc intersection on the left side of B, OA as C
6. Measure length B with a compass
7. Take C as the center of the circle, B as the radius, and make arc intersection OA at d on the right side of C
Then: od length is the length of the line segment (A-C + b)
Make a line with a scale and a compass so that its length is 5 cm
Come on, it's due soon
Draw a right triangle, the two right sides are 1cm and 2cm, the hypotenuse is the root 5cm
How to convert wind energy into hydropower?
First of all, you need to understand the principle of the generator. You should have contacted (I suggest you go to the hardware store) a small generator. When we rotate the rotor of the generator, the stator of the generator will have voltage output. But the problem is how can we make the generator rotate continuously? An external diesel engine is OK, So the principle of wind power generation is very simple. It installs a "fan" on the rotor of the generator. When the wind blows the "fan", the "fan" will drive the rotor of the generator to rotate, and its stator will have power output. If it is applied to every household or road lighting, we have to solve a problem, It is necessary to make the fan rotate in one direction all the time. It's very simple. We can just add a rudder to the fan
What is (a + b) (a-b) - (a-b) equal to
（a+b-1）（a-b）
=（a-b）(a+b-1)=a²-b²-a+b
（a+b-1）（a-b）
The operation of the power of addition, subtraction, multiplication and division of rational numbers
We need more power
Scientific law and counting
3 times 8 divided by | 23 | + 12 divided by minus 63 to the power of 3
Note: its | 23 | represents the absolute value of 23
flvhncm,b,; onpo.jmpfunfbtnyvuntugjbjjkkbb
5+6*2\3-2+6\2*4
5+6*3*4*7\8+9
Given Tana = - 1 / 2, the value of Sin & # 178; a + 2sinacosa-3cos & # 178; a should be
The original formula = (Sin & # 178; a + 2sinacosa-3cos & # 178; a) / (Sin & # 178; a + cos & # 178; a)
=The denominator of Tan & # 178; a + 2tana-3... Is also divided by cos & # 178; a
=1/4 -1-3
=-15/4
On wind and electricity
The wind turbine of wind power plant can generate electricity
And then power a giant fan
The fan gives wind to the wind turbine
Will it keep circulating?
Why?
Impossible, because there is no perpetual motion machine at present. When the fan is working, part of the electric energy is converted into kinetic energy and the other part into heat energy
If two a equals 125, what is six a
125 times 3 = 375
Five mixed operations of rational number addition, subtraction, multiplication, division and power
(1) 23 + (- 73) (2) (- 84) + (- 49) (3) 7 + (- 2.04) (4) 4.23 + (- 7.57) (5) (- 7 / 3) + (- 7 / 6) (6) 9 / 4 + (- 3 / 2) (7) 3.75 + (2.25) + 5 / 4 (8) - 3.75 + (+ 5 / 4) + (- 1.5) (2) calculate with simple method