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Q.

If three angles of a quadrilateral are  65°, 95° and 80°, then the fourth angle is

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a

90°

 

b

95°

 

c

105°

 

d

120°

 

answer is D.

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Detailed Solution

 Given 3 angles 65°, 95°, 80° 

Another 4thangle =x 

65+95+80+x=360° 

Sum of 4 angles in a quadrilateral

x=360−240 =120° 

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