©MathsWatch
Clip 118
Circumference of a Circle
Grade 3 questions
1)
Find the circumference of the following shapes.
a)
b)
3 cm
2)
c)
5m
8 cm
Work out the perimeter of the following shapes.
a)
12 mm
b)
10 cm
3)
The radius of the top of a circular table is 60 cm.
The table also has a circular base with diameter 30 cm.
a) Work out the circumference of the top of the table.
Let be 3.14
b) Work out the circumference of the base of the table.
Let be 3.14
4)
The diagram shows a shape, made from a semi-circle and a rectangle.
The diameter of the semi-circle is 12 cm.
The length of the rectangle is 15 cm.
Calculate the perimeter of the shape.
12 cm
Give your answer correct to
3 significant figures.
15 cm
Page 118 A
©MathsWatch
Clip 118
Circumference of a Circle
Grade 3 answers
1)
Find the circumference of the following shapes.
a)
b)
3 cm
18.852 cm
2)
c)
5m
8 cm
31.42 m
25.136 cm
Work out the perimeter of the following shapes.
a)
12 mm
b)
10 cm
30.852 mm
3)
35.71 cm
The radius of the top of a circular table is 60 cm.
The table also has a circular base with diameter 30 cm.
a) Work out the circumference of the top of the table.
Let be 3.14 376.8 cm
b) Work out the circumference of the base of the table.
Let be 3.14 94.2 cm
4)
The diagram shows a shape, made from a semi-circle and a rectangle.
The diameter of the semi-circle is 12 cm.
The length of the rectangle is 15 cm.
Calculate the perimeter of the shape.
12 cm
Give your answer correct to
3 significant figures.
60.9 cm
15 cm
Page 118 A