COURSE 3 LESSON 8-1 Pairs of Angles Name a pair of adjacent angles and a pair of vertical angles in the figure below. Find m HGK. The adjacent angles are JGI and IGH; HGK and IGH and The vertical angles are KGJ; KGJ and JGI; HGK. JGI and HGK; Since vertical angles are congruent, m 8-1 HGI and HGK = m KGJ. JGI = 145°.