The side that is included between angle F and angle R of the given triangle would be line RF.
How to determine the side included in the given angle?
To determine the side included in the given angle of the triangle, the following steps should be taken as follows:
Given;
∆FTR
The side included in angles ∠R and ∠F should have endpoints at the vertices of R and F. This should be line RF.
Therefore, the required side that is included between that angles R and F is the side length RF.
Complete question:
In ∆FTR, which side is included between ∠R and ∠F?