Question

In the adjoining diagram , lines AB and CD intersect at O . If angle 1 + angle 3= 78° , find the size of angle 2 .

Answer 1

For a straight line angle = 180°
CD=180°
DOB=78°
COB= 180°-78°
=102°
so angle 2 is 102°

Answer 2

Answer:

Step by step explanation

For a straight line angle = 180°

CD=180°

DOB=78°

COB= 180°-78°

=102°

so angle 2 is 102°