Area & perimeter

Measuring area & perimeter

Name: ______________________________Date: ______________Score: ______ / 20

1.
A juice spill covers 10 whole squares and 6 squares that are more than half covered. Each square is 1 cm wide. Estimate the area.
cm²
2.
When you estimate area by counting squares, which squares should you count?
1. AOnly whole squares
2. BWhole squares and squares more than half covered
3. CEvery square that is touched at all
4. DOnly the empty squares
3.
A rectangle has sides 5 cm, 3 cm, 5 cm and 3 cm. What is its perimeter?
cm
4.
The perimeter of a theme park is 5 km. How long is the perimeter in metres?
m
5.
The perimeter of a stamp is 6 cm. How long is the perimeter in millimetres?
mm
6.
How many millimetres are there in 1 centimetre?
mm
7.
How many centimetres are there in 1 metre?
cm
8.
How many metres are there in 1 kilometre?
m
9.
Which unit would you use for the area of a sea?
1. Amm²
2. Bcm²
3. Cm²
4. Dkm²
10.
Which unit would you use for the area of a drop of water?
1. Amm²
2. Bcm²
3. Cm²
4. Dkm²
11.
Which unit would you use for the area of a pond?
1. Amm²
2. Bcm²
3. Cm²
4. Dkm²
12.
What is the perimeter of a 2D shape?
1. AThe total distance all the way around the edge
2. BThe space inside the shape
3. CThe longest side
4. DThe number of corners
13.
What does area measure?
1. AThe distance around a shape
2. BThe amount of surface a shape covers
3. CThe number of sides
4. DThe longest edge
14.
A stain covers 8 whole squares and 4 squares that are more than half covered. Each square is 1 cm wide. Estimate the area.
cm²
15.
Squares that are each 1 cm wide are called…
1. Ametre squares
2. Bcentimetre squares
3. Cmillimetre squares
4. Dkilometre squares
16.
1 km = 1000 m.
True False
17.
1 m = 10 cm.
True False
18.
Area is measured in square units such as cm².
True False
19.
Lee counts only whole squares, Zaid counts every square touched, and Jo counts squares more than half covered. Whose method gives the best estimate of area?
1. ALee
2. BZaid
3. CJo
4. DNone of them
20.
How many metres are there in 3 km?
m

Answer key

Area & perimeter — Measuring area & perimeter

1.16 cm²
2.B. Whole squares and squares more than half covered
3.16 cm
4.5000 m
5.60 mm
6.10 mm
7.100 cm
8.1000 m
9.D. km²
10.A. mm²
11.C. m²
12.A. The total distance all the way around the edge
13.B. The amount of surface a shape covers
14.12 cm²
15.B. centimetre squares
16.True
17.False
18.True
19.C. Jo
20.3000 m