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Answer:
100°
Step-by-step explanation:
let us name the fig. first...
/ a for the left most intersection point
/ b for the top most point
/ c for the angle in between 60° and / b
/ o for the centre
/ e for the bottom most
60°- / f
/ oea=80°(given)
Therefore / oef= 100° (linear pair)
/ boc=70°(given)
therefore / coe=110°(linear pair)
angle sum property of a quad. revels that
/ocf=80°
assuming that line bcf is a straight line, by linear pair x= 100°
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