Question

In the given figure, two straight lines AB and CD intersect at O. If ZAOC = 420, find the measures
of each of the following angles :
(a) LAOD
(b) ZBOD
(c) LCOB
​

Answer 1

law, vertically opposite angles are equal

so so angle COA = angle BOD

42 = 42

YO FIND angle AOD

law, sum of linear pair angles is = 180

so 42 + AOD = 180

AOD = 180 - 42

AOD = 138

law,