Q. A triangle has vertices on a coordinate grid at S(−1,7),T(−1,−1), and U(−5,7). What is the length, in units, of ST ?Answer: □ units
Identify Coordinates: Identify the coordinates of points S and T. S(−1,7) and T(−1,−1).
Calculate Distance: Recognize that the length of bar(ST) is the distance between points S and T. Since both points have the same x-coordinate, the distance between them is the difference in their y-coordinates.
Find Y-coordinate Difference: Calculate the difference in y-coordinates. Difference = y-coordinate of S - y-coordinate of T = 7−(−1)=7+1=8.
Conclude Length: Conclude that the length of bar(ST) is 8 units.Since the x-coordinates are the same, the length of bar(ST) is simply the absolute value of the difference in y-coordinates, which is 8 units.
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