Mr. Wallis is designing a home. He finds the plan for his dream house on the Internet and prints it out.

1. The design of the home is shown at right. If all measurements are in millimeters, what is the area of the diagram?

   Hint (a):

   Separate the diagram into $3$ rectangles and $1$ triangle.

   More Help (a):

   Find the area of these shapes and combine them to find the overall area.

2. Mr. Wallis takes his home design to the copier and enlarges it $400\%$. What is the area of the diagram now? Show how you know.

   Partial Answer (b):

   The area increases by a factor of $4^2$.