Given two lines $a$ and $d$ that are non-coplanar, which of the following best describes their relationship?

Given the points $(3,5)$ and $(-3,-5)$, which points are reflections of each other across both axes?

Point S lies between points R and T on a straight line. If $RT$ is $10$ centimeters long and $RS$ is $4$ centimeters, what is the length of $ST$?

In which diagram are angles $1$ and $2$ vertical angles?

In circle O, if chord $AE$ has length $7$ units and passes through the center O, what is the radius of the circle?

Point A is the center of a circle. If the ratio of the lengths of $\left|\overrightarrow{\mathrm{OA}}\right|$ to $\left|\overrightarrow{\mathrm{OB}}\right|$ is $2:1$, what is the ratio of the areas of the circles with radii $\left|\overrightarrow{\mathrm{OA}}\right|$ and $\left|\overrightarrow{\mathrm{OB}}\right|$?

In the context of geometric vectors, what is the term for points that lie on the same plane?

In the context of geometric vectors, which of the following best describes orthogonal lines?

Triangle xyz is dilated by a scale factor of $3$ centered at the origin. If the original length of side $xy$ is $5$ units, what is the length of side $xy$ after the transformation?