If AB||CD in figure, then the value of x + y is.
Answer & explanation
Correct answer: option 2
AB||CD
According to the figure,
(2x - 10)° + (2y + 20)° = 180° [Parallel line concept]
(2x + 2y)° = 180° - 20° + 10° = 170°
x + y = \(\frac{170}{2}\) = 85°