What is this i need the answer and common denominator 5/6,1/3 and 5/6,2/9

Can (2,3 and square root 10) be sides ona right triangle?

What is the area of the shaded sector?

Jack has a rectangular piece of land, the area of which is represented by a1 = 9.5l. his brother has a different rectangular piece of land, the area of which is represented by a2 = l(14 − l). let a represent the area in square meters and l represent the length in meters of the pieces of land. the two equations plotted on a graph meet at a point as shown in the image