Given that ab=df, ac=de, and bc=fe which congruence statement is true?

Suppose that one doll house uses the 1 inch scale, meaning that 1 inch on the doll house corresponds to 1/2 foot for life-sized objects. if the doll house is 108 inches wide, what is the width of the full-sized house that it's modeled after? in inches and feet.

Runner ran 1 4/5 miles on monday and 6 3/10 on tuesday. how many times her monday’s distance was her tuesdays distance

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.