In a right isosceles triangle, the lengths of both legs are equal. for the given iscoceles triangle, what is the value of x? (the given triangle has a hypotenuse of square root sign with 72 under it. the two legs both have x.)

Thomas is using a drawing program to complete a construction. which construction could he be completing? two perpendicular lines are drawn. inscribing an equilateral triangle in a circle inscribing a square in a circle inscribing a regular pentagon in a circle inscribing a regular hexagon in a circle