M̥ͦi̥ͦs̥ͦh̥ͦḁͦ u̥ͦs̥ͦe̥ͦd̥ͦ 1/4 o̥ͦf̥ͦ ḁͦ c̥ͦḁͦr̥ͦt̥ͦo̥ͦn̥ͦ o̥ͦf̥ͦ 12 e̥ͦg̥ͦg̥ͦs̥ͦ t̥ͦo̥ͦ m̥ͦḁͦk̥ͦe̥ͦ ḁͦn̥ͦ o̥ͦm̥ͦe̥ͦl̥ͦe̥ͦt̥ͦ.h̥ͦo̥ͦw̥ͦ m̥ͦḁͦn̥ͦy̥ͦ e̥ͦg̥ͦg̥ͦs̥ͦ d̥ͦi̥ͦd̥ͦ s̥ͦh̥ͦe̥ͦ u̥ͦs̥ͦe̥ͦ?

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?