Test:
Circles I - Challenging
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Question 1:
Find
α
, if
β
=
56
°
:
A
α
=
50
°
B
α
=
28
°
C
α
=
45
°
D
α
=
112
°
Question 2:
Find
∢
A
O
B
:
A
∢
A
O
B
=
40
°
B
∢
A
O
B
=
50
°
C
∢
A
O
B
=
60
°
D
∢
A
O
B
=
45
°
Question 3:
Find
A
B
:
A
A
B
≅
15
.45
B
A
B
≅
15
.95
C
A
B
≅
16
.85
D
A
B
≅
16
.55
Question 4:
Find
α
:
A
α
=
220
°
B
α
=
215
°
C
α
=
230
°
D
α
=
200
°
Question 5:
Find
α
, where
β
=
43
°
A
α
=
43
°
B
α
=
42
°
C
α
=
86
°
D
α
=
21.5
°
Question 6:
Find
∡
B
E
C
:
A
∡
B
E
C
=
62
°
B
∡
B
E
C
=
55
°
C
∡
B
E
C
=
67
°
D
∡
B
E
C
=
60
°
Question 7:
Find
α
:
A
α
=
62
°
B
α
=
55
°
C
α
=
60
°
D
α
=
65
°
Question 8:
Find
α
, if
α
=
β
A
α
=
80
°
B
α
=
75
°
C
α
=
45
°
D
α
=
90
°
Question 9:
Find the diameter
C
D
:
A
d
=
8.66
B
d
=
9.78
C
d
=
9.23
D
d
=
10
Question 10:
Find the length of the chord
x
in a circle with the radius
6
c
m
if perpendicular distance from the chord to the circle center is
5
c
m
:
A
x
=
5.88
B
x
=
6.62
C
x
=
7.05
D
x
=
3.13
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