What is the surface area of the regular pyramid below?

Is fgh ~ jkl? if so, identify the similarity postulate or theorem that applies.

For the equations below which 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.