What is the radical expression of a4/9

Show your workcan a right triangle have this sides? *how to prove it without using the pythagorean theorema*

21 type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. the solution set of n2 - 14n = -45 is { (separate the solutions with a comma)

Are the corresponding angles congruent? explain why or why not.