Circles

Center

Radius

Radii

Diameter

Chord

Radius Diameter + 2 X Radius = Diameter 2r = d Diameter ÷ 2 = Radius 2 ) d = r

3 in D = ? A. 1 in D. 12 in C. 6 in B. 3 in

6 in D = ? A. 3 in D. 12 in C. 9 in B. 6 in

6 in R = ? A. 3 in D. 12 in C. 9 in B. 6 in

3 in R = ? A. 1.5 in D. 12 in C. 6 in B. 3 in

How do you find the circumference of a circle? is the symbol for the Greek letter Pi.

Pi is an irrational number.

Diameter x 3.14 = Circumference 3.14 = Pi Pi = π C = πd D = π)c

3.14 = Pi C = πdD = π)c 10 in

3.14 = Pi C = πd 12 m

3.14 = Pi C = πd 9 in

3.14 = Pi C = πd 8 ft a) b) c) d) 24.82

3.14 = Pi C = πd 15 cm a) b) c) 47.1 d) 74.1

3.14 = Pi C = πd 25 cm a) b) 57.8 c) 5.78 d) 78.5

3.14 = Pi C = πd 10 m a) 62.8 b) 6.28 c) 31.4 d) 3.14

3.14 = Pi C = πd 15 m a) 4.71 b) 47.1 c) 92.4 d) 94.2

40 yds a) 20 b) 40 c) 60 d) 80 R = ?

16 m a) 4 b) 8 c) 16 d) 32 R = ?

20 cm a) 10 b) 20 c) 30 d) 40 D = ?

16 ft a) 8 b) 16 c) 32 d) 48 D = ?