To find the length of the vertical side using the given coordinates, we can look at the vertical coordinates of the points that share the same x-coordinate.
The points are:
- (15, -3)
- (19, -6) - Not used since this x-coordinate is different.
- (15, -10)
We will examine the points (15, -3) and (15, -10). The vertical distance (length of the vertical side) can be calculated by finding the absolute difference between their y-coordinates:
\[ \text{Distance} = |y_2 - y_1| = |-10 - (-3)| = |-10 + 3| = |-7| = 7 \]
Thus, the length of the vertical side is 7 centimeters.