The angles of a quadrilateral are (x + 10)o, 2yo, 90o and (100 - y)o, Find y in terms of x
A
y = 160 + x
B
y = 100 + x
C
y = 160 - x
D
y = x - 100
Verified Correct Answer: C.
Step-by-Step Mathematical Solution
Sum of the angles in a quadrilateral = 360o
(x + 10o) + 2y + 90o + 100 - y = 360o
x + y + 200 = 360o
y = 360 - 200 - x
y = 160 - x
Source: Myschool Past Questions Archive (Record #36361)