PQ is equal to RQ so b=?

2-digit numbers less than 91 which are 1 less than a multiple of 10

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?

6cm10 cma conical paper cup has dimensions as shown in the diagram. how much water can the cup hold when full?