USING YOUR MATH 5. A circular swimming pool has a diameter of 22 feet. A cover that just fits over the top of the
pool would have an area that is closest to which of the following?
(1) 69 sq. ft
(3) 732 sq. ft
(2) 380 sq. ft
(4) 1,521 sq. ft

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?