If a line has a slope of $3$, which of the following lines is perpendicular to it?

Which of the following statements about $\mathrm{secants}$ and $\mathrm{chords}$ in a $\mathrm{right}\mathrm{triangle}$ is true?

In right triangle $ABC$, angle $C$ is the right angle, side $AB$ is $10$ units, and side $BC$ is $6$ units. What is the measure of angle $BAC$? Round to the nearest whole degree.

Given a right triangle QSR with right angle at S, if $qs$ is one leg and $qr$ is the hypotenuse, what is the measure of angle $qsr$ in degrees?

In right triangle $ABC$, angle $BAC$ measures $56°$. What is the measure of angle $BDC$ if $D$ is a point on $AC$ such that $BD$ is perpendicular to $AC$?

Given a right triangle where side $LK$ is $7$ units, side $KJ$ is $24$ units, and $LJ$ is the hypotenuse, what is the measure of angle $LKJ$? Round to the nearest whole degree.

If you are given two $\mathrm{angles}$ in a $\mathrm{right}\mathrm{triangle}$, what additional information do you need to determine all the $\mathrm{side}\mathrm{lengths}$ of the $\mathrm{triangle}$?

A regular polygon has $8$ sides. What is the measure of each interior angle?

In a right triangle, if point A is at $(3,2)$ and point B is at $(3,7)$, what is the vertical change from point A to point B?