100 Day Summer Challenge

100 problems in 100 days. #100problems

Day 72

72 of 100: Fan

Geometry

What is the area of the blue figure?

Each arc is that of a circle of radius 2. The figure is symmetrical, the top portion is a semicircle with a diameter of 4 units, and the very bottom is a single point.

Your Current Progress

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100