18. If ZW and ZV are supplementary angles and m2V = 49°, find m/W.
19. If 21 and 22 are vertical angles, <2 and <3 are complementary angles,
and m23 = 56°, find m21.

18 If ZW and ZV are supplementary angles and m2V 49 find mW 19 If 21 and 22 are vertical angles lt2 and lt3 are complementary angles and m23 56 find m21 class=