a
20o
b
40o
c
60o
d
80o
e
100o
Explanation
Correct Option
bVideo Explanation
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Discussions (5)

Overwatch886
2 years ago
I think the picture used here looks more like 90 degrees for the mid angle. I think we need a better image resource for easy understanding.

fasehunokikiola
6 years ago
Pls I don't understand the questions..It seems the question is not complete.

Favouruniquewilliams
1 year ago
It is not 90 it is 60
This question is 2015 no6
don't worry I'll explain it


