the points A, B,C and D are plotted on a line consecutively. AB=BC+CD=6 cm. Find the distance between M and N, which are the midpoints of segments AB and CD, respectively. Fill in the blanks of the Statement/Reason solution.

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?