Which of the following statements must be true? A. If two polygons are similar they have the same shape
B. If two polygons are similar they have the same size
C. All rectangles are similar
D. All squares are similar

It says factor each expression 49x-28?

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?

What is the total area of the figure?