In a right triangle, if one of the acute angles is $a$, what expression represents the measure of the other acute angle $x$?

In which right triangle is the value of $x$ equal to ${\cos }^{-1}\left(\frac{4.3}{6.7}\right)$?

In a right triangle, if angle $ONP$ is one of the non-right angles and the other non-right angle measures $50°$, what is the measure of angle $ONP$?

In a right triangle, if angle $A$ measures $37°$, what is the measure of the other non-right angle $B$?

Given a right triangle with angle $A$, opposite side $a$, adjacent side $b$, and hypotenuse $c$, which expression can be used to find $\angle A$?

In a right triangle, the radius of a circle is $8$ cm and the measure of the central angle $\angle LOM$ is $60°$. What is the approximate length of minor arc $LM$? Round to the nearest tenth of a centimeter.

Given a right triangle with angle $A$ and sides $a$ (opposite), $b$ (adjacent), and $c$ (hypotenuse), which of the following expressions can be used to find the measure of angle $A$? Select one correct option.

Given that lines $b$ and $c$ are parallel and angle $6$ is formed by a transversal intersecting these lines, what is the measure of angle $6$?

If $\mathrm{angle}2$ is congruent to $\mathrm{angle}6$ in two right triangles, which of the following statements is true about the ratios of their corresponding sides?