Given the similar triangles below setup a proportion of corresponding side lengths that uses only the variables provided​

Turner's mom measured his room to see how long the wallpaper border needed to be. if two walls are 15 feet long and two walls are 12 feet long, how long should the strip of border be cut?

Aladder that is 20ft long is leaning against the side of a building. if the angle formed between the ladder and the ground is 75 degrees how far is the bottom of the from the base of the building?

A10 inch cookie cake is divided into 8 slices. what is the area of 3 slices