What is the perimeter of the shape below?

4 + 3 + 4 + 3 = 14cm

What is the perimeter of the shape below?

12cm

What is the area of the shape below?

(Assume each square is 1cm^{2})

13cm^{2}

What is the area of the shape below?

8 x 7 = 56cm^{2}

What is the area of the shape below?

4 x 5 = 20cm^{2}

What is the perimeter of the shape below?

10 + 24 + 26 = 60cm

What ist the area of the shape below?

5 x 12 ÷ 2 = 30cm^{2}

What is the area and perimeter of the shape below?

Perimeter

12 + 6 + 7 + 8.4 = 33.4cm

Area

0.5(12 + 8.4) x 6 = 61.2cm^{2}

What is the area of the shape below?

Split the shape into a rectangle (6 x 4) and a square (4 x 4)

(6 x 4) + (4 x 4) = 40cm^{2}

What is the area of the shape below?

14 x 20 ÷ 2 = 140cm^{2}

What is the area of the shape below?

Triangle: 10 x 20 ÷ 2 = 100cm^{2}

Minus the square: 100 - 16 = 84cm^{2}

So the area is 84cm^{2}

What is the area of the shape below?

Area of the large triangle: 22 x 20 ÷ 2 = 220cm^{2}

Area of the small triangle: 11 x 10 ÷ 2 = 55cm^{2}

Total area: 220 – 55 = 165cm^{2}

What is the area of the shape below?

Triangle on top: 2 x 13 ÷ 2 = 13cm^{2}

Rectangle underneath: 4 x 13 = 52cm^{2}

Total area: 13 + 52 = 65cm^{2}

Which of the shapes below has the largest area?

Triangle area = 28cm^{2}

Rectangle area = 28.75cm^{2}

Trapezium Area = 28.5cm^{2}

Rectangle has largest area.

Convert 15cm^{2} into mm^{2}.

1 cm^{2} = 10mm x 10mm = 100mm^{2}

15 x 100 = 1500mm^{2}

Convert 1.3m^{2} into cm^{2}

1m^{2} = 100cm x 100cm = 10000cm^{2}

1.3 x 10000 = 13000cm^{2}

How much will it cost to buy carpet for a rectangular room measuring 6m by 8m?

The carpet costs £12.50 per square metre.

The floor area is 6 x 8 = 48m^{2}

Carpet costs 12.5 x 48 = £600

A football field is a rectangle 160m long and 70m wide.

a) Before the game the team has to run around the field twice. How far do they run?

b) The groundsman can water the ground at a rate of 100m^{2} per minute. How long will it take him to water the entire field?

a) Perimeter of field 460m

So they run 2 x 460 = 920m

b) Area of the field is 11200m^{2}

Time to water is 11200 ÷ 100 = 112 minutes or 1 hour 52 minutes