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The geometrical structure depicted in the picture is called ...

Hippocrates hairpin
Spiral of Archimedes
Euclid's crust
Spiral of Theodorus
In geometry, the spiral of Theodorus is a spiral composed of contiguous right triangles. It was first constructed by Theodorus of Cyrene.The principle of construction is based on the Pythagorean theorem.
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Answers by country

Hippocrates hairpin
Spiral of Archimedes
Euclid's crust
Spiral of Theodorus
answers
flagFrance
0%
21%
8%
69%
23
flagthe Netherlands
3%
19%
11%
65%
26
flagCanada
7%
15%
15%
61%
13
flagAustria
2%
28%
8%
60%
45
flagGreece
0%
26%
26%
47%
19
flagPoland
8%
30%
16%
44%
4654
flagthe Philippines
0%
53%
6%
40%
15
flagPakistan
10%
30%
20%
40%
10
flagSwitzerland
3%
50%
10%
35%
28
flagthe United States
5%
49%
10%
34%
159
flagGermany
7%
46%
12%
32%
226
flagDenmark
0%
50%
20%
30%
10
flagthe United Kingdom
11%
46%
13%
29%
89
flagAustralia
0%
60%
12%
28%
25
flagIndia
11%
41%
19%
26%
116
flagRepublic of Ireland
0%
53%
23%
23%
13

Which direction is not possible to point at when standing at the South Pole?

east
west
north
neither east, west, nor south

What is the maximum distance a plane can fly travelling constantly North?

10,002 km
20,004 km
40,007 km
It can fly endlessly (as long it can)

How many edges does a Möbius strip have?

one
two
three
four

In which year did Leonhard Euler introduced the symbol "i" to represent the square root of -1 ?

in 1555
in 1666
in 1777
in 1888