Circles
What is the difference between a circle and a sphere?
A circle is 2-D and a sphere is 3-D
8 x 7 =
56
72 ÷ 9 =
8
4 + 8 ÷ 2 =
8
4p = 16
p =
p = 4
What is a radius?
The distance from the edge of a circle to the center.
90 x 5 =
450
150 ÷ 2 =
75
(2 + 5) x 4 ÷ 2 =
14
3n + 8 = 8
n =
n = 0
What is a circumference?
The distance all the way around a circle.
20 x 80 =
1600
** Daily Double **
1 ÷ 2 =
0.5
(9 - 7) x (4 + 6) ÷ 2 =
10
** Daily Double **
3b + 5 = 14
b =
b = 3
** Daily Double **
If a circle has a diameter of 10cm, what is its circumference?
31.4cm
28000
45 ÷ 15 =
3
** Daily Double **
4 + 4 x 4 - 4 ÷ 4 =
19
2v + 5 = -7
v =
v = -6
What is the area of a circle with a radius of 10cm?
314.1cm
2000 x 900 =
1800000
20 ÷ 2 ÷ 5 =
2
*** Daily Double **
[6 x (4 - 3)] ÷ [(5 +5) -4)]
1
-8y + 11 = 59
y =
y = -6