if A is any point outside the parallelogram PQRS, then prove that : triangle PSQ + triangle RAS= 1÷2 parallelogram PQRS​

Name the most appropriate metric unit for each measurement like the mass of cow

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?

Aquadrilateral has exactly one pair of parallel sides. which name best describes the figure?