There are 15 girls and 10 boys in a 5th grade class. what is the ratio of girls to boys? write this as a simplified fraction.

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?

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge

What rule describes a dilation with a scale factor of 4 and the center of dilation at the origin?