Seeing as the smaller one is "8" on side AB, the side RT on the bigger one is 28, meaning it must go up by the number 20.
Side BC is 10, so you would add 20 onto RS.
10+20=30
Side RS is 30
Quadratic formula = (-b +- sqrt(b^2 - (4ac))) / 2a
and
then simplify and solve
So basically sense the lion is 50 and the elephant is 25 that’s half of 50 so if you find the lion’s distance you divide it by to and that’s the answer