What is the area of an isosceles right triangle if one of its legs is r cm long

Logan genetically engineered a new type of fir tree and a new type of pine tree. the combined height of one fir tree and one pine tree is 2121 meters. the height of 44 fir trees stacked on top of each other is 2424 meters taller than one pine tree. how tall are the types of trees that logan genetically engineered? each fir tree is meters tall and each pine tree is meters tall.