Does this formula work for a circle with a radius of 3 inches show your work

Joey is asked to name a quadrilateral that is also a rhombus and has 2 pairs of parallel sides.should be his answer

If a distance of 75 yds is measured back from the edge of the canyon and two angles are measured , find the distance across the canyon angle acb = 50° angle abc=100° a=75 yds what does c equal?

Suppose the equation ||x-a|-b|=2008 has 3 distinct real roots and a not =0. find the value of b.