G22a
1)
Circles - Circumference
In all questions, take π to be 3.142
Find the circumference of the following circles
a)
b)
c)
9.4 cm
6.5 cm
8 cm
e)
d)
16.7 cm
14 cm
2)
a)
f)
Find the perimeter of the following
b)
18 cm
11 cm
9.6 cm
c)
12 cm
3) The circumference of the earth is
approximately 40000 km.
10 cm
d)
60°
.
If you had a piece of string which was 6.3 m
longer than 40000 km and put it around the
earth, how far away from the earth, all the way
round, would the extra 6.3 m allow it to be?
a) 0.1 mm
© Mathswatch Ltd
b) 1 mm
c) 1 cm
d) 1 m
Page 76A
Circles - Area
G22b
In all questions, take π to be 3.142
1)
Find the areas of the following circles
a)
b)
c)
9.4 cm
6.5 cm
8 cm
e)
d)
16.7 cm
14 cm
2)
a)
f)
Find the areas of the following
b)
18 cm
11 cm
9.6 cm
c)
12 cm
d)
10 cm
.
e)
60°
.
130°
5 cm
© Mathswatch Ltd
Page 76B