State if the polygons are similar. If yes, state how

Can someone help?

Which expression is equivalent to sq-80

What is the value of f(x) = 2.2 for f(-2)?

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?