Question

in the given figure two straight lines AB and CD intersect at a point
if angle AOC =42° , find the measure of each of the angle
1) angle AOD. 2) angleBOD. 3) angle
COB

Answer 1

given that angle AOC = 42°
then AOC + AOD = 180° ( angle on straight line)
AOD = 180°-42°
AOD = 138°
then angle AOD = angle COB
angle COB = 138°
and angle AOC = BOD
angle BOD = 42°

SO......AOC= 42°
AOD = 138°
BOD 42°
COB 138°
hope this helps you :)