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Answered by
1
a) x = 180-20+40+20 => 180-80
x= 100
Answered by
0
In first part you have to add like this:-
40°+20°+X+20°=180°
then:-
add them
80°+X=180°
X=180°-80°
X=100°
this is your answer for first part
now for second part you have to subtract angle BOC from 180
third , fourth and fifth part are too easy try it
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