Multiple Choice Question (MCQ)
In the figure, if y >60 and AB = BC, which of the following must be true?
I. \alpha +y>180\degree
II. y>z
III. \alpha=y+z
-
×
I only
-
×
II only
-
×
III only
-
×
I and II
-
✓
II and III
In the figure, if y >60 and AB = BC, which of the following must be true?
I. \alpha +y>180\degree
II. y>z
III. \alpha=y+z
I only
II only
III only
I and II
II and III
\because y>60\degree
\therefore x= z <60\degree , II is the choice.
\because \alpha = x+y
and
x=z
\therefore \alpha = y+z , III is the choice