The design of the home is shown at right. If all measurements are in millimeters, find the area of the diagram.
Divide the shape into smaller, easier shapes.
There is a
triangle. The height is and the base is .
By subtracting the base of the triangle from
, you can find the length of the rectangle.
Mr. Wallis took his home design to the copier and enlarged it
%. What is the area of the diagram now? Show how you know.
If the design is enlarged by
%, how many times bigger is the shape? How does the area of the new shape change?