In a right triangle, if one of the non-right angles (angle $6$) measures $141°$, what is the measure of the other non-right angle (angle $5$)?

Given that $m\angle bgc=6x-13°$ and $m\angle cgf=4x+3°$, what is $m\angle bgf$?

In the figure above, points $P$ and $Q$ lie on a circle with center $O$. If triangle $OPQ$ is a right triangle with right angle at $P$, and $OP=5$, $OQ=13$, what is the value of $PQ$ (denoted as $s$)?

In a right triangle, what is the definition of $\sin$ of an angle $\theta$?

In a right triangle, what is the tangent ratio for angle $\theta$?

How many sides does a regular polygon have if each interior angle measures $160°$?

If the sum of the interior angles of a polygon is $1080°$, how many sides does the polygon have?

How many sides does a regular polygon have if each interior angle measures $144°$?