— 5 3/4 - 3 1/2
I need help fast

Alex drew a circle with right triangle prq inscribed in it, as shown below: the figure shows a circle with points p, q, and r on it forming an inscribed triangle. side pq is a chord through the center and angle r is a right angle. arc qr measures 80 degrees.

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

In the diagram, the ratio of ab to ae is (1/2) . what is the ratio of the length of to the length of ?