When two points have either the same x-coordinate or the
same y-coordinate, we can find the distance between them
by simply adding or subtracting the coordinates that vary.
Task: Find the distance between the two points
above, type it into the text box, and then click Continue.
Distance = 18
Both marked points lie 7 units to the right
of the y-axis. Therefore, they lie on a line parallel to
the y-axis. This line is indicated in the above diagram by
a dotted green line. To find the distance between them, we need
to find the distance of the dotted line. The (7, 6) point is 6 units
from the x-axis, and the (7, –12) point is 12 units
from the y-axis. Therefore, the two points are 6 + 12 = 18
units away from each other.
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