Download - Circles. Center Radius Radii Diameter Chord
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Circles
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Center
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Radius
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Radii
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Diameter
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Chord
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RadiusRadius
Diameter
+
2 X Radius = Diameter2r = d
Diameter ÷ 2 = Radius2)d = r
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3 in
D = ?
A. 1 in
D. 12 inC. 6 in
B. 3 in
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6 in
D = ?
A. 3 in
D. 12 inC. 9 in
B. 6 in
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6 in
R = ?
A. 3 in
D. 12 inC. 9 in
B. 6 in
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3 in
R = ?
A. 1.5 in
D. 12 inC. 6 in
B. 3 in
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C d
How do you find the circumference of a circle?
is the symbol for the Greek letter Pi.
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22
7
Pi is an irrational number.
7 22
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C
d
3.1415926538979323846...
3.14
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Diameter x 3.14 = Circumference
3.14 = Pi
Pi = π
C = πd
D = π)c
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3.14 = Pi
C = πd D = π)c
10 in
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3.14 = Pi
C = πd
12 m
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3.14 = Pi
C = πd
9 in
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3.14 = Pi
C = πd
8 ft
a) 25.12b) 2.512c) 24.32d) 24.82
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3.14 = Pi
C = πd
15 cm
a) 32.46b) 46.21c) 47.1d) 74.1
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3.14 = Pi
C = πd
25 cm
a) 75.83b) 57.8c) 5.78d) 78.5
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3.14 = Pi
C = πd
10 m
a) 62.8b) 6.28c) 31.4d) 3.14
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3.14 = Pi
C = πd
15 m
a) 4.71b) 47.1c) 92.4d) 94.2
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40 yds
a) 20b) 40c) 60d) 80
R = ?
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16 m
a) 4b) 8c) 16d) 32
R = ?
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20 cm
a) 10b) 20c) 30d) 40
D = ?
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16 ft
a) 8b) 16c) 32d) 48
D = ?