Q. 525.0( 1 Vote )

In the adjoining figure, y = ?


A. 36°

B. 54°

C. 63°

D. 72°

Answer :

x + y + 90 = 180 (sum of angles on a straight line)


x + y = 90 ………………….(i)


3x + 72 = 180 (sum of angles on a straight line)


3x = 108


x = 108/3 =36O


Putting this value in eq (i), we get


x + y = 90


36 + y = 90


Y = 90 – 36 = 54O

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