Chuck has 140 ft of fencing with which he wants to fence in two
connecting, adjacent square pens with fencing between the two
pens (see the figure). what will be the dimensions if the length
of the entire enclosed region is to be twice the width?

Look at the figure below: triangle abc is a right triangle with angle abc equal to 90 degrees. the length of ac is 5 units and the length of ab is 4 units. d is a point above c. triangle adc is a right triangle with angle dac equal to 90 degrees and dc parallel to ab. what is the length, in units, of segment cd?