To find the perimeter of this shape, we need to add the lengths of all its outer edges.

The labeled dimensions are:

• $45 \, m$
• $30 \, m$
• $25 \, m$
• $60 \, m$

The shape is an L-shape, so it has both vertical and horizontal sides. Some of these sides are not labeled directly, but we can determine their lengths by subtracting other lengths.

1. Total Horizontal Distance:

   • The bottom side is labeled $60 \, m$.
   • The top horizontal part consists of two segments: one is $30 \, m$ (labeled), and the other is $60 - 30 = 30 \, m$.

2. Total Vertical Distance:

   • The left side is labeled $45 \, m$.
   • The right vertical side consists of two segments: $25 \, m$ (labeled) and $45 - 25 = 20 \, m$ for the shorter right side.

Now, we add all outer segments: $45 + 30 + 20 + 25 + 30 + 60 = 210 \, m$

So, the perimeter is: $\textbf{210 m}$

This matches the correct answer shown in red.

Would you like a step-by-step breakdown of this solution or any further clarification?

Here are five related questions to deepen your understanding:

1. How would you calculate the area of this L-shaped figure?
2. What if one side of the L-shape was unknown? How would you approach finding its perimeter?
3. How can we verify the perimeter of composite shapes using smaller rectangles?
4. What is the difference between calculating the perimeter and the area of a shape?
5. Can you think of other shapes where subtraction helps in finding missing lengths?

Tip: When dealing with composite shapes, break them down into smaller parts to calculate unknown sides or other measurements accurately.