In a box of apples and oranges the ratio of oranges, to all the fruit is 9:3. If the box contains 78 pieces of fruit, how many are oranges?

Really need on these. i have no idea what to do

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles

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?