Answer:

angle = 18, complement = 72.

X = angle    90 - x = complement             Let x = mÐ1            4x = measure of the                                                                      

                                                                     x + 4x = 90                      Complement

                                                                    5x = 90    

(90 - x) = 4x                                                x = 18⁰                           

5x = 90                                                       4x = 72⁰       

x = 18                                                                   

90 - x = 72⁰