The values of three angles at a point are 3y - 45o, y + 25o and yo . Find the value of y.
A
40o
B
58o
C
68o
D
76o
Verified Correct Answer: D.
Step-by-Step Mathematical Solution
(3y - 450 + (y + 25) + t = 360o(angles at a point)
3y - 45 + y + 25 + y = 360
5y = 360 + 20
5y = 380
y = \(\frac{380}{5}\)
= 76o
Source: Myschool Past Questions Archive (Record #36193)