P, Q and R are inner angles in a triangle. If P= Q+ R, what can't be the size of Q?  Select
A) 30 DEGREES B) 40 DEGREES C) 90 DEGREES D) 50 DEGREES E) 60 DEGREES
Given P= Q+ R, and P, Q and R are inner angles in a triangle. Thus P+ Q+ R= 180   Q+ R+ Q+ R= 180 =&gt; 2(Q+ R) = 180 =&gt; Q+ R= 90. Thus Q will be less than 90.   Hence the answer is 90 DEGREES.
<result>C</result>
P, Q and R are inner angles in a triangle. If P= Q+ R, what can't be the size of Q?