Can someone help me with number 7?

The first hexagon is dilated to form the second hexagon select the answers from the drop box menus to correctly complete the statement

The amount of energy it takes to lift a box might be a function of which of the following

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?