1 Calculate the Perimeter of Net above (Show your Workings)

The perimeter of the net is the sum of the lengths of all its outer edges.
The outer edges are:

• The two slanted sides of the top triangle (labeled "The Back"): $215 \text{ mm}$ each.
• The right vertical side of the rectangle labeled "Side 1": $200 \text{ mm}$.
• The bottom horizontal side of the rectangle labeled "Side 1": $150 \text{ mm}$.
• The bottom horizontal side of the rectangle labeled "The Floor": $200 \text{ mm}$.
• The bottom horizontal side of the rectangle labeled "Side 2": $150 \text{ mm}$.
• The left vertical side of the rectangle labeled "Side 2": $200 \text{ mm}$.
• The two slanted sides of the bottom triangle (labeled "The Front"): $215 \text{ mm}$ each.

$$\text{Perimeter} = (215 \text{ mm} + 215 \text{ mm}) + 200 \text{ mm} + 150 \text{ mm} + 200 \text{ mm} + 150 \text{ mm} + 200 \text{ mm} + (215 \text{ mm} + 215 \text{ mm})$$ $$\text{Perimeter} = 430 \text{ mm} + 200 \text{ mm} + 150 \text{ mm} + 200 \text{ mm} + 150 \text{ mm} + 200 \text{ mm} + 430 \text{ mm}$$ $$\text{Perimeter} = (430 + 430) \text{ mm} + (200 + 200 + 200) \text{ mm} + (150 + 150) \text{ mm}$$ $$\text{Perimeter} = 860 \text{ mm} + 600 \text{ mm} + 300 \text{ mm}$$ $$\text{Perimeter} = 1460 \text{ mm} + 300 \text{ mm}$$ $$\text{Perimeter} = 1760 \text{ mm}$$

The perimeter of the net is $\text{1760 mm}$.