In every triangle, the largest side, is opposite the largest angle.
Also, the smallest side, is opposite the smallest angle.
a.

so

,
because RQ is opposite angle P, the largest,
PR is opposite angle Q , the middle
and PQ is opposite angle R, the smallest.
Greatest side: RQ
b. The sum of the measures of the interior angles of any triangle is 180°,
so

thus, m(C) is the largest angle. This means the largest side is the side AB.
Answers:
a) RQ
b)AB
Answer: FG = 3x + 10
<u>Step-by-step explanation:</u>
EF + FG = EG <em>Segment Addition Postulate</em>
x-7 + FG = 4x+3 <em>Substitution</em>
-7 + FG = 3x + 3 <em>Subtraction Property of Equality</em>
FG = 3x + 10 <em>Addition Property of Equality</em>
454.90, the 5 makes the 9 go up which in turn makes the 8 also go up.