Super simple
So he wants to be three pounds away from his ideal weight (168)
Which means he can either be 3 pounds under or 3 pounds over
So his min is 165, his max is 171
8 US gallons = 30.28329 Liters
AC is common between triangle ABC and triangle CDA...
Angle ABC=angle CDA ( opposite angles in parallelogram are equal)
So both triangles are congruent ( 1 common line and 2 equal angles)
