The values of three angles at a point are 3y - 45 o , y
MATHEMATICS
WAEC 2006
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
Correct Answer: D. 76o
Explanation
(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
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