If the perimeter of an equilateral triangle is equal to that of a circle, then their area ratio is equal to

If the perimeter of an equilateral triangle is equal to that of a circle, then their area ratio is equal to

Let the side length of an equilateral triangle be D 2 π r = 3D π R: [(radical 3) / 4] * D, and it will be good

When the radius of a circle is fixed, the area of the circle is proportional to the ratio of circumference______ .

Because the area of the circle s = π R2,
In this problem, the radius of the circle is fixed, and the circumference ratio is also certain,
So the area is also certain,
In other words, the three quantities are all fixed, and there is no problem of variable,
So the area of the circle is not proportional to the PI;
So the answer is: ×

The radius of a circle is inversely proportional to its PI______ (judge right or wrong)

Because the area of the circle = π R2, when the area of the circle is fixed, the PI is also a constant value,
Therefore, the area of the circle is fixed, and the ratio of the circumference is not proportional to the radius of the circle;
So the answer is: ×

What is the ratio of the radius of a circle to its area I hope to introduce this knowledge point in detail

The area of a circle is proportional to the square of its radius
the measure of area
=πR²
Area / R 2 = π is a constant value
So the area of the circle is proportional to the square of the radius

The sizes of 218 × 310 and 210 × 315 were compared

∵218×310=28×210×310=28×610，210×315=210×310×35=610×35，28＞35，
∴218×310＞210×315．

Calculate the power 0 of (pi-3.14) - 3 + - 1 power of (1 / 2) - 2010 power of (- 1)

(PI - 3.14) - 3 + - 1 of (1 / 2) - 2010 of (- 1)
=1+2-1
=3-1
=2

The PI is multiplied by 11-100

11 34.54
12 37.68
13 40.82
14 43.96
15 47.1
16 50.24
17 53.38
18 56.52
19 59.66
20 62.8
21 65.94
22 69.08
23 72.22
24 75.36
25 78.5
26 81.64
27 84.78
28 87.92
29 91.06
30 94.2
31 97.34
32 100.48
33 103.62
34 106.76
35 109.9
36 113.04
37 116.18
38 119.32
39 122.46
40 125.6
41 128.74
42 131.88
43 135.02
44 138.16
45 141.3
46 144.44
47 147.58
48 150.72
49 153.86
50 157
51 160.14
52 163.28
53 166.42
54 169.56
55 172.7
56 175.84
57 178.98
58 182.12
59 185.26
60 188.4
61 191.54
62 194.68
63 197.82
64 200.96
65 204.1
66 207.24
67 210.38
68 213.52
69 216.66
70 219.8
71 222.94
72 226.08
73 229.22
74 232.36
75 235.5
76 238.64
77 241.78
78 244.92
79 248.06
80 251.2
81 254.34
82 257.48
83 260.62
84 263.76
85 266.9
86 270.04
87 273.18
88 276.32
89 279.46
90 282.6
91 285.74
92 288.88
93 292.02
94 295.16
95 298.3
96 301.44
97 304.58
98 307.72
99 310.86
100 314

Product of 1 to 100 times PI (take 3.14) (tabulated) Be sure to make a table (⊙ o ⊙ pi = 3.14!

3.14（*1）6.289.4212.5615.718.8421.9825.1228.2631.4（*10）34.5437.6840.8243.9647.150.2453.2856.5259.6662.8（*20）65.9469.0872.2275.3678.581.6484.7887.9291.0694.2（*30）97.34100.48103.62106.76109.9113....

How many bits of PI are there? What are the 100 digits of Pi?

3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510 58209 74944 59230 78164 06286 20899 86280 34825 34211 70679

It is known that a belongs to {a | a = k times PI + (- 1) ^ k times (PI / 4), K belongs to Z}, so we can judge the quadrant of angle A

a = kπ + (-1)^k*π/4 = [k+(-1)^k/4]*π
Discussion:
If k = 2n, n belongs to an integer, then a = (2n + 1 / 4) * π, and the angle a is in the first quadrant;
If k = 2n + 1, n belongs to an integer, then a = (2n + 1 - 1 / 4) * π = (2n + 3 / 4) * π, the angle a is in the third quadrant
So angle a is in the first or third quadrant