Question

xii
) If AB || CD in fig A.7, then the measure of x° is:
a) 10°
b) 20°
c) 30°
d) 40°
B
D
X
Fig A7
(120+x)”
A
C С
X120
?​

Answer 1

55

explain how the light bends when it travel from denser to rarer medium with a diagram