7. Transformations of Quadratic Graphs
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To estimate the area of the floor of the building, let's find the area of the triangle with the given vertices.
We can also count squares to find the area of the triangle. After noticing that two of the vertices are on a vertical line, we can extend the triangle to a rectangle.
The area of the rectangle is 8×5=40 square units. The area of the triangle is half of this, so 20 square units.