How do you find a rectangular prisms height with length and width given

Name each raycalculation tip: in ray "ab", a is the endpoint of the ray.

The trigonometric ratios sine and secant are reciprocals of each other

The construction of copying qpr is started below. the next step is to set the width of the compass to the length of ab. how does this step ensure that a new angle will be congruent to the original angle? by using compass take the measures of angle and draw the same arc according to it.