X, Y and Z are inner angles in a triangle. If X= Y+ Z, what can't be the size of Y?
Choices:
A) 30 DEGREES	B) 90 DEGREES	C) 60 DEGREES	D) 70 DEGREES	E) 950 DEGREES
Given X= Y+ Z, and X, Y and Z are inner angles in a triangle. Thus X+ Y+ Z= 180   Y+ Z+ Y+ Z= 180 =&gt; 2(Y+ Z) = 180 =&gt; Y+ Z= 90. Thus Y will be less than 90.   Hence the answer is 90 DEGREES.
<result>B</result>
X, Y and Z are inner angles in a triangle. If X= Y+ Z, what can't be the size of Y?