PLEASE HELP In a right triangle, the side adjacent to angle x is 4 units. The side opposite that angle is 9 units. What is the measure of angle x?
a. 33degrees
b. 55degrees
c. 66degrees
d. 44 degrees

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?