Hi, there--
In a triangle, the longest side is always opposite the largest interior angle.
The shortest side is always opposite the smallest interior angle.
.
List the sides from shortest to longest.
Therefore, from shortest to longest, we have
the side opposite ∠t
the side opposite ∠r
the side opposite ∠s
Feel free to email if you have questions about this,
Ms.Figgy
math.in.the.vortex@gmail.com