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
E
125o
Verified Correct Answer: E.
Step-by-Step Mathematical Solution
Sum of the angle of a pentagon
= (2 x 5 - 4) x 90
= 540o
126 + 114 + y + 92 + 83 = 540
y = 540 - 415 = 125o
Source: Myschool Past Questions Archive (Record #23877)