Question

Three angles of a quadrilateral are in the ratio 1:5:6. The mean of these angles is 60°
The fourth angle is
A) 1689
B) 150°
C) 120°
D) 90°​

Answer 1

Step-by-step explanation:

168 degree is the correct answer

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Answer 2

Step-by-step explanation:

let take 1:5:6 as 1x,5x,6x.

1x+5x+6x+60°=360°

12x+ 60°=360°

12x=360°-60°=300°

x= 300/12

x=25.

the forth angle = 6x= 6x25

x= 150° .

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