Question on: WAEC Mathematics - 1997
The interior angles of a pentagon are 126o, 114o, y, 92o and 83o. Find the value of y.
A
85o
B
95o
C
105o
D
115o
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Correct Option: E
Sum of the angle of a pentagon
= (2 x 5 - 4) x 90
= 540o
126 + 114 + y + 92 + 83 = 540
y = 540 - 415 = 125o
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