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The perimeter of a shape is the distance around its edge. To work out the perimeter of a hexagon multiply the length of one of its sides by 6. If its sides are 2 meters long its perimeter would be 12 meters. The area is the size of the surface. Knowing the area of a wall is important if you are planning to give it a lick of paint - otherwise how will you know how many tins of paint to buy?!

1.

A regular hexagon has a perimeter of 54cm. What is the length of the sides?

6cm

9cm

12cm

20cm

A regular hexagon has 6 equal sides. To calculate the length of each side, divide the perimeter by 6

2.

Which would be a suitable unit to measure the area of a chunk of chocolate?

Square grams

Square meters

Square millimeters

Square milliliters

Grams measure weight and milliliters measure volume. Square meters measure area but chocolate bars aren't that big!

3.

Which would be a good estimate of the area of a classroom?

1,000mm^{2}

100mm^{2}

10m^{2}

100m^{2}

10m^{2} would be large enough for a room in a house but not big enough for a classroom

4.

How many cm^{2} is equivalent to 1m^{2}?

10cm^{2}

100cm^{2}

1,000cm^{2}

10,000cm^{2}

There are 100cm in 1m so 100 x 100 = 1,000

5.

What is the formula for calculating the area of a rectangle?

2 x length x 2 x width

2 x length + 2 x width

Length + width

Length x width

If a rectangle measured 7cm by 10cm its area would be 70cm^{2}

6.

Which would be best measured in cm^{2}?

Area of a playground

Area of a town

Area of a desk top

Area of a pen tip

Towns might be measured in km^{2}, playgrounds in m^{2} and pen tips in mm^{2}

7.

What is the formula for calculating the perimeter of a regular hexagon?

4 x length of side

6 x length of side

6 x length + width

Length of side divided by 6

As a regular hexagon has 6 equal sides, just multiply the length of the sides by 6

8.

What is the formula for calculating the perimeter of a rectangle?

2 x length x 2 x width

2 x length + 2 x width

Length + width

Length x width

2 sides of a rectangle are one length whilst the other two sides are a different length, for example 2 sides are 4cm long and the other 2 sides are 6cm long. This rectangle would have a perimeter of 20cm

9.

A rectangle has a perimeter of 38cm. The shortest sides are 7cm. What length are the two longest sides?

12cm

14cm

21cm

28cm

2 x 7 = 14

38 - 14 = 24

24 ÷ 2 = 12

38 - 14 = 24

24 ÷ 2 = 12

10.

What is the perimeter of a regular pentagon with sides of 5cm?

24cm

100cm

10cm

25cm

A pentagon has 5 sides, therefore 5 x 5cm will give you the perimeter