Mathematics
WAEC 2008
The angles of a quadrilateral are (x + 10)
o, 2y
o, 90
o 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
Correct Answer: Option C
Explanation
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
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