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Home > INT2 > Chapter 12 > Lesson 12.2.3 > Problem 12-112

12-112.
  1. Mr. Wallis is designing a home. He finds the plan for his dream house on the Internet and prints it out. Homework Help ✎

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

    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.

Separate the diagram into 3 rectangles and 1 triangle.

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

The area increases by a factor of 4².