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determine whether each claim about the properties of abcd and abcd is t…

Question

determine whether each claim about the properties of abcd and abcd is true or false.
\\( \overline { a d } \\) and \\( \overline { a ^ { \prime } d ^ { \prime } } \\) are on distinct parallel lines.
\\( \overline { c d } \\) and \\( \overline { c ^ { \prime } d ^ { \prime } } \\) are both perpendicular to the x-axis.

Explanation:

Step1: Analyze the first claim

When a figure is transformed (assuming a translation, rotation, reflection etc. which is common in such problems), if two line - segments are parallel in the original and transformed figure, we check their slopes.
Let's assume \(A(-1, - 1)\), \(D(2,-4)\). The slope of \(\overline{AD}\) is \(m_{AD}=\frac{-4 + 1}{2+1}=\frac{-3}{3}=-1\). If \(A'\) and \(D'\) are the transformed points (assuming a rigid transformation), the slope of \(\overline{A'D'}\) will be the same as the slope of \(\overline{AD}\) (since rigid transformations preserve slope). Parallel lines have the same slope. If they are on distinct lines (not coincident), then \(\overline{AD}\) and \(\overline{A'D'}\) are on distinct parallel lines.

Step2: Analyze the second claim

For a line - segment to be perpendicular to the \(x\) - axis, it must be a vertical line. A vertical line has an undefined slope (or in terms of coordinates, if two points \((x_1,y_1)\) and \((x_2,y_2)\) form a line - segment, then \(x_1=x_2\)).
For \(\overline{CD}\), if \(C(2,1)\) and \(D(2,-4)\), \(x\) - coordinate of \(C\) and \(D\) is \(x = 2\). For \(\overline{C'D'}\) (after a rigid transformation which preserves the \(x\) - coordinate relationship), if \(C'\) and \(D'\) are the images of \(C\) and \(D\) under a rigid transformation (translation, rotation, reflection), the \(x\) - coordinate of \(C'\) and \(D'\) will be the same. A line - segment with the same \(x\) - coordinate for its endpoints is perpendicular to the \(x\) - axis.

Answer:

  1. True
  2. True