Can I please get help for those 3 questions ??

Terri makes a quilt using three sizes of fabric squares the side lenght of each fabric square is the square root of the area

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Use circumcenter theorem to solve for the given values