Angles                                                           UP

  ABC - acute angle ( greater than 0, but less than 90°)
          B is the vertex, are the sides.

                                 

                                            KLN - obtuse angle ( greater than 90°, but less than 180° )
                                                                    

  POM - straight angle ( it's measure is 180°)                          

               

 

  Adjacent angles
           ADC  and  CDB are adjacent. They have the same vertex
             and share a common side.              

                                                                                                                                                     

   Supplementary angles
       a)    POB   and  NML  are supplementary.
                    
Their sum is 180°

                                                         

  b)          YOX  and  YOT are adjacent 
    

                                 and supplementary.                         
   

Complementary angles
      

  a)      KMN  and  AOB are complementary.
         
                              

                                                                     Their sum is 90°.                                                      

                        
            
                                                           b)  AOC  and  COB  are complementary.   
                                                                                                                                           

                                                                                                                                                               UP