Answer:
30 degrees i hope this helps! :)
Explanation:
measure of angle Q is 90 degrees
measure of angle R is 60 degrees
measure of angle S is 30 degrees
side RQ is 1 unit
side RS is 2 units
side SQ is 1.732 units
 
Right Scalene Triangle 
Side a = 1 
Side b = 1.73205 = √3 
Side c = 2 
 
Angle ∠A = 30° = 0.5236 rad = π/6 
Angle ∠B = 60° = 1.0472 rad = π/3 
Angle ∠C = 90° = 1.5708 rad = π/2 
 
C=90°B=60°A=30°b=1.732a=1c=2 
 
Area = 0.86603 
Perimeter p = 4.73205 
Semiperimeter s = 2.36603