To find the length between landmarks A (the White House) and E (the National Portrait Gallery), we need to determine the distance between their coordinates on the grid.
- Coordinates for Point A (White House): (4, 3)
- Coordinates for Point E (National Portrait Gallery): (12, 3)
To calculate the distance between points A and E, we can use the distance formula, which in this case simplifies to the difference in the x-coordinates since both points have the same y-coordinate:
Distance = |x2 - x1|
Where:
- x1 is the x-coordinate of Point A (4)
- x2 is the x-coordinate of Point E (12)
Distance = |12 - 4| = |8| = 8 units
Thus, the length between landmark A and landmark E is 8 units.